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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 5351. |
A plant cell become turgid due to the |
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Answer» Endosmosis Thnx jay Absorbtion of water by cell resulting in swelling of cell thereby provide turgur pressure to its cell wall |
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| 5352. |
What is osmotic potential |
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Answer» It is the decrease in chemical potential of pure water due to the presence of solute particle in it. Osmotic potential can be difined as the amount by which water potential is reduced as a result of presence of solutes.. thats it |
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| 5353. |
Which bone is called beauty of the bones |
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Answer» Clavicle or collar bone i thik its should be shoulder bone. Cheeck bone and collar bone |
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| 5354. |
What is harmogonia with examples?? |
| Answer» Hormogonia are motile filaments of cells formed by some cyanobacteria in the order Nostocales and Stigonematales. They are formed during vegetative reproduction in unicellular, filamentous cyanobacteria, and some may contain heterocysts and akinetes.Cyanobacteria differentiate into hormogonia when exposed to an environmental stress or when placed in new media.Hormogonium differentiation is crucial for the development of nitrogen-fixing plant cyanobacteria symbioses, in particular that between cyanobacteria of the genus Nostoc and their hosts. In response to a hormogonium-inducing factor (HIF) secreted by plant hosts, cyanobacterial symbionts differentiate into hormogonia and then dedifferentiate back into vegetative cells after about 96 hours. Hopefully, they have managed to reach the plant host by this time. The bacteria then differentiate specialized nitrogen-fixing cells called heterocysts and enter into a working symbiosis with the plant.Depending on species, Hormogonia can be many hundreds of micrometers in length and can travel as fast as 11 μm/s. They move via gliding motility, requiring a wet-able surface or a viscous substrate, such as agar for motion. | |
| 5355. |
What is perisperm in flowering plants...???? |
| Answer» The\xa0perisperm\xa0is the nutritive tissue of a\xa0seed\xa0derived from the nucellus and deposited external to the embryo sac —distinguished from endosperm. Some examples of perispermic\xa0seeds\xa0are Sugar beet, coffee, and black pepper.\xa0A layer of nutritive tissue in the seed of certain\xa0flowering plants\xa0that is derived from the nucellus and surrounds the embryo. (biology) The layer of nutritive tissue, derived from the nucellus, that surrounds the embryo of a seed in some\xa0angiosperms. | |
| 5356. |
Can u tell me about any channel on YouTube who teach biology very well. |
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Answer» Biomentars and vipin sharma tutorials Etoosindia is best youtube channel for puc Biomenters |
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| 5357. |
Explain the micturition. |
| Answer» Micturition basically means urination(passing out urine from the body) | |
| 5358. |
Wjat is monograph |
| Answer» Monographs: it includes detailed information of one taxon which may be a family, order, genus etc. They include all already known species within a group and also add any newly discovered species in that particular group. It also mentions all information on the species e.g. their geographic distributions, morphological and anatomical feature etc. | |
| 5359. |
What is systole? |
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Answer» Stage when contraction of ventricles occur to pass the blood into aorta and veins The time at which ventricular contraction occurs.systole is the contraction of the chambers of the heart, driving blood out of the chambers. The chamber most often discussed is the left ventricle. However, all four chambers of the heart undergo systole and diastole in a timed fashion so that blood is propelled forward through the cardiovascular system. Hello |
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| 5360. |
In small intestine duodenum is U shaped or C shaped. |
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Answer» Thax to all bt i get the answer it is generally C shaped bt horizontally U shaped Duodenum is C shaped U shaped It is u shaped |
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| 5361. |
A bat is connecting link between aves and mammals. Explain? |
| Answer» Bat can fly as birds and also it has bones in its wings and bones are present in humans to ..... | |
| 5362. |
which cell is responsible for growth |
| Answer» Meristematic cells | |
| 5363. |
Why imbibition does not take place in pinus seed?? |
| Answer» Imbibition\xa0takes place\xa0both in\xa0living\xa0and dead\xa0cells. It\xa0takes place\xa0in solids, liquids and gases. It is a reversible process. It is not a reversible process.\xa0Induced dormancy, enforced dormancy or\xa0seed\xa0quiescence occurs when a\xa0seed\xa0fails to\xa0germinate\xa0because the external environmental conditions are inappropriate for\xa0germination, mostly in response to conditions being too dark or light, too cold or hot, or too dry. | |
| 5364. |
Anyone please explain briefly \' VERNALISATION\'? |
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Answer» Vernalisation is defined as the qualitative or quantitative dependence of plants on exposure to a low temperature to flower. Temperature affects flowering, metabolic activities, and germination of seeds in plant. High tempreture in plants |
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| 5365. |
Explain the electron transport system |
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Answer» Thank you The metabolic pathway of electron transport is called as electron transport system or ETS.Glycolysis and Krebs cycle result in the formation of reduced coenzymes such as 10 molecules of NADH +H+ ions and 2 molecules of FADH2 and 4 molecules of ATP. These reduced coenzymes need to be oxidized to release energy stored in them. This is possible by the transport of electrons and protons from these coenzymes to oxygen through electron carriers present in the inner mitochondrial membrane. This metabolic pathway of electron transport is called as electron transport system or ETS.\xa0ETS comprises of several energy carriers which include NADH dehydrogenase complex (Complex I), Ubiquinone (Complex Q), Succinate dehydrogenase complex (complex II), Cytochrome bc1 complex (Complex III), Cytochrome c, Cytochrome c oxidase (Complex IV) |
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| 5366. |
What is cloaca in cockroach |
| Answer» A cloaca is an orifice through which urine and feces are eliminated in birds, reptiles, amphibians, and a few branches of the mammal family tree. It also serves a reproductive function like the ****** in females of these species, and also performs the function of sperm ejaculation in males of some species.The cloaca serves as a waste-elimination point for both urine and feces. In animals with cloacas, both the intestinal and urinary tracts end at the cloaca. This makes it the animal’s all-purpose waste-elimination site. | |
| 5367. |
Why water potential of solution is negative? |
| Answer» The term water potential was first used by Slatyer and Taylor (1960). The free energy per mole of any particular chemical species in a multicomponent system is defined as the chemical potential of that species. The chemical potential of water is referred to as the water potential (ψw). Since the ψ of pure water is zero (0), the presence of solute particles reduces the free energy of water, thus decreases the water potential (negative value). Therefore,ψ of solution is always less than zero or its highest value is zero. | |
| 5368. |
What is difference between adhesion and cohesion |
| Answer» adhesion is a force of attraction b/w the molecule of two different substance nd cohesion is the force of attraction b/w the molecule of same substance. | |
| 5369. |
What is spleen? |
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Answer» In vertebrates including humans a duct less vascular glands, located in left upper abdomen near the stomach ,which destroy old RBC , remove debris from of blood stream, acts as reservoir of blood and produce lypmphocytes Spleen is a organ which help in formation of red blood corpsulces. It has two parts. |
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| 5370. |
Why is osmotic potential given a negative sign |
| Answer» Osmotic potential of pure water is always zero whereas, that of a solution is negative due to the presence of solute. Presence of lesser amount of the solute makes the osmotic potential less negative and when the solute is greater osmotic potential becomes more negative. | |
| 5371. |
What is difference between inflammations and symtoms? |
| Answer» Inflammation -is a response by our immune system.It is necessary for healing of damaged tissues,wounds,infections,etc. In it, More blood is supplied to the affected area to facilitate movement of WBCs and healing.This causes redness,swelling and heat. Chemicals are secreted to make the area more sensitive ..resulting in pain. Swelling ...when you get hit by something is an example.Symptoms - on the other hand are a different thing.They are signs of illness caused by any disease. Such as ...pain in joints can be a sign/symptom of arthritis. | |
| 5372. |
Cogulation of blood |
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Answer» Blood coagulates in response to an injury or trauma. Coagulation is a mechanism to prevent excessive loss of blood in case of injury. Clot is a dark reddish brown scum which is formed at the site of an injury over a period of time. This is formed by a network of threads called fibrins in which dead and damaged formed elements of blood are trapped. Heparin |
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| 5373. |
What are monocots |
| Answer» The seed having one cotyledons is called monocots | |
| 5374. |
Name two heteropolysaccharides |
| Answer» Heparin and Hyaluronic acid.... | |
| 5375. |
What is nodule ond ful form PEP |
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Answer» Ur welcome Thanks for sending me answer Nodules are the small,spherical outgrowths on the roots. PEP---Phosphoenolpyruvate. |
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| 5376. |
What do u mean by plant growth regulation |
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Answer» Thanks for sending me answer Plant growth regulators can be defined as chemicals which signal to regulate and control the growth of plants. They are also referred to as plant hormones or phytohormones. Plant hormones are organic compounds which are either produced naturally within the plants or are synthesized in laboratories. They profoundly control and modify the physiological processes like the growth, development, and movement of plants. In other words, plant growth regulators can accelerate as well as retard the rate of growth in plants.Plants hormones are mainly responsible for –\tDifferentiation and elongation of cells.\tFormation of\xa0leaves, flowers, and stems.\tWilting\xa0of\xa0leaves.\tRipening of\xa0fruit.\tSeed dormancy, etc. |
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| 5377. |
How many lacrimals r present in the axial skeleton of human being? |
| Answer» 2 lacrimals are present | |
| 5378. |
How Is the water transported up to the leaves in the trees which may be more than 100m high? |
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Answer» Thanks The process of upward movemebt of water through xylem element is known as translocation of water . It occurs according to transpiration pull theory. This theory explains about the upward movement of water , which is due to tension arising at the surface of the leaves . The tension passes into the roots . Te roots consist of cell sap which has high OP (osmotic pressure) . So, the water from the surrounding soil solution enters into the root cell and increases the turgidity of the cell . It causes endoosmosis. The absorbed water now translocation into the cortex and then to xylem. In the lumen of xylem , the attraction of water takes place and cohesion occurs. At the same time ,the water molecules get attached to the wall of xylem . This is due to adhesion . It makes a continuous column of water and reaches to the top of the plant . It is known as transpiration pull theory as transpiration acts as a tension on the surface of the leaves . So the greater the rate of transpiration ,greater will be the rate of translocation . In doubt Bro. ... |
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| 5379. |
Law of limiting factor in easy language... |
| Answer» Law of limiting Factor: (a) It was proposed by F. F. f Blackmann (1905).(b) It states that “if a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value; it is the factor that directly affects process as its quantity is changed”.c) The rate of photosynthesis is affected mainly by the concentration of CO2 light intensity and thetemperature.(d)As the light intensity is increased, the rate of photosynthesis increases proportionately until some other factor like CO2 or temperature may become limiting.(e) Similarly, if the concentration of CO2 is increased the rate of photosynthesis increases until light may become a limiting factor. | |
| 5380. |
Is in monocot stem , cuticle is absent ? |
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Answer» Yes.. Yes in the monocot stem it is absentOk ok&& Yes |
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| 5381. |
What is the advantage of giving scientific name to the organism? |
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Answer» Organisms can be easily catagorised.This helps in making it easy to understand about the specific organism.These names are accepted universally.The names are unique.This helps avoid confusion created by common names..... To have a common name |
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| 5382. |
What is skeletal system? |
| Answer» Skeletal system consists of a framework of bone and a few cartilages. Bone and cartilage are specialised connective tissues. The former has a very hard matrix due to calcium salts in it and the latter has slightly pliabl matrix due to chondroitin salts. It is grouped into two principal division the axial and the appendicular skeleton. ........ | |
| 5383. |
Which plant hormone induces immediate closure of stomata |
| Answer» Ethylene.. | |
| 5384. |
Cellwall is made up of? |
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Answer» It\'s cellulose Mani prabu....listen ....it is not fixed that cell wall is present only in plants....it could be in fungi or other living organism too except animals.....it could be made of many things ......like cellulose ...protein or etc....it\'s up to u that what do u want to ask...... I do know how tis app working so only,just simple question asked Celllose |
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| 5385. |
Important function of protein on our body |
| Answer» Functions of Proteins\tEnzymes: Enzymes mostly carry out all numerous chemical reactions which take place within a cell. They also help in regenerating and creating DNA molecules and carry out complex processes.\tHormones: Proteins are involved in the creation of various types of hormones which help in balancing the components of the body. For example hormones like insulin, which helps in regulating blood sugar and secretin. It is also involved in the digestion process and formation of digestive juices.\tAntibody: Antibody also known as an immunoglobulin. It is a type of protein which is majorly used by the immune system to repair and heal the body from foreign bacteria. They often work together with other immune cells to identify and separate the antigens from increasing until the white blood cells destroy them completely.\tEnergy: Proteins are the major source of energy that helps in the movements of our body. It is important to have the right amount of protein in order to convert it into energy. Protein, when consumed in excess amounts, gets used to create fat and becomes part of the fat cells. | |
| 5386. |
........................ relates to flowering based on relative length of day and night. |
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Answer» U r correct. It\'s photoperiodism.... Tnk u Ishita.... Ishita ,plz ans. It. ....... Photoperiodism Is it photoperiodic ????????? Plz give the ans..................... |
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| 5387. |
Why is pancrease known as endocrine as well as exocrone gland? |
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Answer» Manimozhi Because it secrete hormone as well as enzymes Actually......dog of world is .....u know.....hahahahaha!!??? Well.....what\'s ur real name?? |
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| 5388. |
Diagram of blood clotting |
| Answer» Blood clotting, or coagulation, is an important process that prevents excessive bleeding when a blood vessel is injured. Platelets (a type of blood cell) and proteins in your plasma (the liquid part of blood) work together to stop the bleeding by forming a clot over the injury. Typically, your body will naturally dissolve the blood clot after the injury has healed. Sometimes, however, clots form on the inside of vessels without an obvious injury or do not dissolve naturally. These situations can be dangerous and require accurate diagnosis and appropriate treatment. | |
| 5389. |
Bile also activates lipases yes or not? |
| Answer» Bile juice is secreted by the liver. It is a yellowish color fluid. The main function of bile juice is to digest the lipid molecules and to activate the lipase enzymes. Bile juice helps to break down the lipid molecules into di-and monoglycerides by the lipase enzymes. | |
| 5390. |
explaincentrosome and centrioles briefly |
| Answer» Centrosome is also called as the \'cell centre\'. Centrosome is a rod like organelle occurring near the nucleus. Centrosome is formed by 2 centrioles, each being formed by 9 triplet microtubules in 9+0 arrangement encloses structures called as centrioles. It helps the cell during cell division by the formation of spindle fibres. It is specifically present in animal cells only.Centriole as an organelle is made to use in organizing the mitotic spindle and completing the cytokinesis. At one point in time, centrioles were believed to be necessary for the creation of mitotic spindle in the animal cell. Although, many fresh experimentations established that the cell which does not have a centriole (surgically removed through laser) could function without them in the G1 level of interphase and then the centriole could be created in the future in a de novo manner. | |
| 5391. |
Hiii all⚘ |
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Answer» Harshit can i ask u something...?????why are u here in this app to say hello everyone.....everyday??????? Hlwww Hlo |
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| 5392. |
Electron transport system means |
| Answer» The metabolic pathway of electron transport is called as electron transport system or ETS.Glycolysis and Krebs cycle result in the formation of reduced coenzymes such as 10 molecules of NADH +H+ ions and 2 molecules of FADH2 and 4 molecules of ATP. These reduced coenzymes need to be oxidized to release energy stored in them. This is possible by the transport of electrons and protons from these coenzymes to oxygen through electron carriers present in the inner mitochondrial membrane. This metabolic pathway of electron transport is called as electron transport system or ETS.\xa0ETS comprises of several energy carriers which include NADH dehydrogenase complex (Complex I), Ubiquinone (Complex Q), Succinate dehydrogenase complex (complex II), Cytochrome bc1 complex (Complex III), Cytochrome c, Cytochrome c oxidase (Complex IV)Steps in ETS:* Electrons are transferred from NADH+H+ to Ubiquinone through complex I and protons are moved from mitochondrial matrix to intermembrane space.* Electrons from FADH2 are transferred to Ubiquinone through complex II and protons are moved from mitochondrial matrix to intermembrane space.* Ubiquinone transfers the electrons to complex III.* Complex III transfers electrons to complex IV through Cytochrome c. Some protons are moved from mitochondrial matrix to intermembrane space.* Complex IV contains Cytochrome a and Cytochrome a3. It transfers the electrons to final acceptor, the oxygen.* Oxygen combines with 2 H+ ions and reduces to water which drives ETS.2H+ + 2e- + ½ O2 --------- H2O + Energy\xa0 | |
| 5393. |
what is Sweaberg unit in ribosome? |
| Answer» Svedberg unit is a measure of particle size dependent on the speed with which the particles sediment in the ultracentrifuge.S=1×10 to the power -13The ribosomes are of 3 types namely 70s and 80s 70s are found in prokaryotes and 80s are found in eukaryotes | |
| 5394. |
what are the models of Plasma membrane? who found it and in the year? |
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Answer» http://www.biologydiscussion.com/cell/plasma-membrane/top-4-historical-models-of-plasma-membrane-cell-biology/83448 This is also known as unit membrane model. This model was proposed by Davson Daniell and Robertson. When surface tension measurements made on the membranes, it suggests the presence of proteins. After the existence of proteins the initial lipid bilayer model proposed by Gorter and Grendel was modified. It was suggested that surface tension of cells is much lower than what one would expect if only lipids were involved.It may also be observed that if protein is added to model lipid water system, surface tension is lowered. This suggested indirectly the presence of proteins. On this basis Davson and Danielli proposed that plasma membrane contained a lipid bilayer with protein on both surfaces.Initially they supposed that proteins existed as covalently bonded globular structures bound to the polar ends of lipids. Subsequently they developed the model in which the protein appears to be smeared over the hydrophilic ends of the lipid bilayer. This model makes its popularity for a long time.With the availability of electron microscope later, fine structure of plasma membrane could be studied. Definite plasma membrane of 6 nm to 10 nm (10nm = 100 Å; 1 nm = 10_6mm) thickness was observed on surface of all cells, and plasma membranes of two adjacent cells were found to be separated by a space, 1-15nm wide. 2. Unit Membrane Model (Protein-Lipid Bilayer-Protein): The following points highlight the top four historical models of Plasma Membrane. The models are: 1. Lipid and Lipid Bilayer Models 2. Unit Membrane Model (Protein-Lipid Bilayer-Protein) 3. Fluid Mosaic Model 4. Dannelli Model. 1. Lipid and Lipid Bilayer Model:This model to explain the structure of plasma membrane was given by Overton, Gorion and Grendel. Previously only indirect information was available to explain the structure of plasma membrane. In 1902, Overton observed that substances soluble in lipid could selectively pass through the membranes. On this basis he stated that plasma membrane is composed of a thin layer of lipid.Subsequently, Gorter and Grendel in 1926 observed that the extracted from erythrocyte membranes was twice the amount expected if a single layer was present throughout the surface area of these cells. On this basis they stated that plasma membrane is made up of double layer of lipid molecules. These models of Gorter and Grendel could not explain the proper structure of plasma membrane but they put the foundation of future models of membrane structure. |
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| 5395. |
In plants, is there toxicity of MACRONUTRIENTS...??? |
| Answer» Micronutrients\xa0are needed in very small Amounts by the plants, but if their concentration decreases, then it causes deficiency symptoms and if it increases it causes\xa0toxicity. The nutrient is considered to be toxic which reduces the dry weight of tissue by about 10 percent.Nutrients that plants require in larger amounts are called macronutrients. About half of the essential elements are considered macronutrients:\xa0carbon,\xa0hydrogen,\xa0oxygen,\xa0nitrogen,\xa0phosphorus,\xa0potassium,\xa0calcium,\xa0magnesium, and\xa0sulfur. | |
| 5396. |
How categories of blood takes place |
| Answer» Differences between arteries, veins and capillaries:\xa0\tArteryVeinCapillary(i) It is a thick walled blood vessel.It is a thin walled blood vessel.It is an extremely narrow blood vessel having very thin walls.(ii) It carries blood from the heart to different parts of the body.It brings blood from the different parts of the body to the heart.They form an extensive network throughout all living cells in the body and connect arteries and veins.(iii) It can dilate or constrict depending on the regulatory requirement of the body.It cannot dilate or constrict.It can dilate or constrict according to the requirement of the tissue.(iv) It does not contain any valve.It contains simple valves which permit blood flow only towards the heart.It does not contain any valves.\t\xa0 | |
| 5397. |
Diffrentiate phycobiont b/w mycobiont |
| Answer» Phycobiont refers to the algal component of the lichens and mycobiont refers to the fungal component. Both of these are present in symbiotic relationship in which Algae prepare food for Fungi due to presence of chlorophyll whereas the fungus provides shelter to algae and absorbs water and nutrients from the soil. | |
| 5398. |
morphology in plant |
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Answer» Morphology is the branch of science which deals with the study of form and structure. In botany. It generally means the study of external features, forms and relative positions of different organs on plants. Chapter 5 of ncert |
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| 5399. |
Make a list of therapeutic, structural, contractile, hormonal, enzymatic and transport proteins |
| Answer» Answer??? | |
| 5400. |
Explain briefly citric acid cycle or TCA cycle with the help of labelled diagram |
| Answer» The citric acid cycle, shown in —also known as the tricarboxylic acid cycle (TCA cycle) or the Krebs cycle—is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate—derived from carbohydrates, fats, and proteins—into carbon dioxide. The cycle provides precursors including certain amino acids as well as the reducing agent NADH that is used in numerous biochemical reactions. Its central importance to many biochemical pathways suggests that it was one of the earliest established components of cellular metabolism; it may have originated abiogenically. | |