InterviewSolution
Saved Bookmarks
InterviewSolution
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.
| 751. |
What is bowel movement? |
| Answer» A bowel movement is the last stop in the movement of food through your digestive tract | |
| 752. |
Important points in transport of gases from.chapter breathing |
| Answer» | |
| 753. |
What is cork cambium? |
| Answer» Cork cambium is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.\xa0The first\xa0cork cambium\xa0is\xa0formed\xa0by the dedifferentiation of the outer part of the cortex. As the stem increases in girth, the epidermis and the cortex are replaced by another meristematic tissue called the\xa0cork cambium. ... Cells on the inner region\xa0form\xa0the secondary cortex or phelloderm. | |
| 754. |
What is taxa? |
| Answer» Every taxanomical character is individually known as TAXA . | |
| 755. |
Difference between inspiratory reserve volume and expiratory reserve volume |
| Answer» \tInspiratory reserve volume\xa0(IRV)Expiratory reserve volume (ERV)1. It is the maximum volume of air that can be inhaled after a normal inspiration.1. It is the maximum volume of air that can be exhaled after a normal expiration.2. It is about 2500 – 3500 mL in the human lungs.2. It is about 1000 – 1500 mL in the human lungs.\t | |
| 756. |
Why solute potential have negative value? |
|
Answer» naaa,,, The more the amount of solute, the more negative is the value solute potential. So the solute potential of a solution is always negative due to the increase in the solute concentration in a solution. I think more no. Of solute molecules increases the solute potential....??? Ohh thanks now i got it......? Solute potential is always negative as more the solute molecules in the solution lesser the solute potential. |
|
| 757. |
Is the CBSE biology test paper class 11 useful for class 11 final exams? |
| Answer» Yes | |
| 758. |
Differentiate between heart wood and sapwood? |
|
Answer» Difference # Sapwood or Alburnum:1. It is outer wood of an old stem.2. It is light coloured.3. Living cells are present.4. Sapwood is the functional part of the secondary xylem or wood.5. The tracheary elements are not plugged by tyloses.6. Tracheary elements do not possess any deposition in their lumen.7. Sapwood or alburnum is lighter.8. It is less durable because it is susceptible to attack by pathogens and insects.Difference # Heartwood:1. It is the central wood of an old stem.2. Heartwood is dark coloured.3. Living cells are absent.4. Heartwood is the non-functional part of secondary xylem.5. The tracheary elements are plugged by tyloses.6. Tracheary elements have deposition of tannins, resins, gums, etc.7. Heartwood is heavier.8. It is more durable due to its little susceptibility to the attack of pathogens and insects. \tSap woodHeart wood1. The outer region of the old trees forms the sap wood1. The central region of the old trees forms the Heart wood2. It is also called as alburnum2. It is also called as duramen3. it is soft and not durable3. it is hard and durable4. It is light coloured and formed of living cells4. It is dark coloured due to the deposition of various substances5. Vessels are not blocked by tyloses5. Vessels are blocked by tyloses with various deposits6. The function of this region is conduction of water and nutrients and also storage of food6. The function of this region is mechanical support\t\xa0 |
|
| 759. |
What is the mean of common genital pore |
| Answer» Common external openings of the male and female reproductive systems are called the genital pores. | |
| 760. |
Explain guttation |
| Answer» The loss of water in the form of liquid droplets from the leaf margins and tip in herbaceous plants is known as guttation. | |
| 761. |
What are the main steps in Krebs cycle? |
| Answer» The TCA cycle takes place over eight different steps:Step 1: First the acetyl CoA (a two carbon molecule) joins with oxaloacetate (4 carbon molecule) to form citrate (6 carbon molecule).Step 2: The citrate is then converted to isocitrate (isomer of citrate)Step 3: Isocitrate is then oxidised to alpha-ketoglutarate (a five carbon molecule) which results in the release of carbon dioxide. One NADH molecule is also formed in this step.The enzyme responsible for catalysing this step is isocitrate dehydrogenase. This is a rate limiting step as isocitrate dehydrogenase is an allosterically controlled enzyme.Step 4: Here alpha-ketoglutarate is oxidised to form a 4 carbon molecule which picks up coenzyme A forming succinyl CoA. This conversion also forms a NADH molecule.Step 5: Succinyl CoA is then converted to succinate (4 carbon molecule) and one GTP molecule is produced.Step 6: Succinate is converted into fumarate (4 carbon molecule) and a molecule of FADH₂ is produced.Step 7: Fumarate is converted to malate (another 4 carbon molecule).Step 8: Malate is then converted into oxaloacetate and NADH is also produced here. | |
| 762. |
How are the minerals absorbed by the plant? |
| Answer» Mineral absorption by plants :(a) It occurs by apoplast and symplast pathways.(b) It may be by diffusion, facilitated diffusion, osmosis active and passive uptake(c) The minerals enter roots in bulk along stream of water under the influence of transpiration pull.(d) Active salt absorption needs energy. | |
| 763. |
which function of liver is responsible for its link with kidney in excretion? |
|
Answer» thanks for your answer but I want answer in few lines. ?? Liver is the master organ of the body.it breaks down haemoglobin of aged RBCs into bile pigaments.the pigaments are released into duodenum derivatives of steriod hormones, cholesterol,few vitamins,drugs along with bile.liver deaminates excess of amino acid resulting in the production of ammonia.ammonia combines with Co2 resulting in the formation of urea. the urea seprated in kidney for removal. |
|
| 764. |
Why thistle funnel is named so???? |
|
Answer» Thank u so.....much...... Because it is a funnel having the shape of thistle flower n a long glass stem. this funnel is used to add reagents to reaction vessels. generally made of glass |
|
| 765. |
What is phyllotaxy? |
| Answer» Phyllotaxy is the arrangement or distribution of leaves on the stem or its branches in such a way that they receive maximum sunlight to perform photosynthesis. Phyllotaxy is of three types :1.Alternate or Spiral: In this type, a single leaf arise at each node in an alternate manner, e.g. Hibiscus rosa sinensis.2.Opposite : Two leaves are borne from the node in opposite directions. It is of two types : (i) Opposite Superposed: e.g., Quisqualis. (ii) Opposite Decussate: e.g., Calotropis.3.Whorled or Verticullate: More than two leaves are borne on a node, which form a whirl. | |
| 766. |
Define the double fertilisation and triple fussion. |
| Answer» Double fertilisation is the combination of syngamy and triple fusion. Double fertilization is unique to flowering plants. Events during fertilisation are elucidated.\xa0*As the pollen grain falls on the stigma of the flower, it germinates and forms a pollen tube. Pollen tube is guided by the secretions of the ovule. Pollen tube enters the micropylar region of the ovule.\xa0*Embryo sac inside an ovule consists of antipodals, synergids, egg cell, a central cell with two polar nuclei.\xa0*As the pollen tube releases two male gametes into synergids cytoplasm. One of the male gametes fuses with the nucleus of egg cell by the process of syngamy (first fertilisation) to form diploid zygote(2n).\xa0*The other male gamete fuses with the central cell and forms primary endosperm nucleus (PEN). This fusion is called as triple fusion. After the triple fusion the central cell is called as primary endosperm cell. | |
| 767. |
Distinguishes between aerobic and anaerobic respiration. |
|
Answer» The breakdown of glucose in the absence of oxygen to produce energy is called as anaerobic respiration The breakdown of glucose in the presence of oxygen to produce more amount of energy is called as aerobic respiration. |
|
| 768. |
Fruits ripeing investigatory project |
| Answer» | |
| 769. |
Which app is must for neet prepration |
| Answer» Topper | |
| 770. |
Why the concentration of certain ions is higher inside the vacuole than in cytoplasm??.... |
| Answer» Vacuoles are important plant organelles which help in osmoregulation. Hence some ions are actively concentrated to maintain their balance and the fluidity of the cytoplasm. Giardia lamblia is a protozoan parasite with two unequal nuclei in its cell. | |
| 771. |
What is plasticity? |
| Answer» Plasticity refers to the environment in which plants follow different pathways in response to environment or phases of life forming different kinds of structures. The environmental plasticity is best seen in emergent hydrophytes,eg., Ranunculus flabellaris(buttercup). | |
| 772. |
What is osmolarity?? |
|
Answer» And osmole is defined as the no. Of moles oc solute that contribute to osmotic pressure..... As it is cleared by its name.....osmole + molarity...as we know molarity is the concentration of solution expressed as no. of moles of solute per liter of solution.......so it is the no. Of osmoles (as a solute) per liter of a solution Osmolarity is a unit which is used to measure solute concentration. It is also referred as osmotic concentration. Osmolarity is measured in the terms of osmoles of solute present in one liter of solution (Osm/L). Thus, it tells about osmotic pressure contributed by number of moles of a compound of a solution.\xa0 |
|
| 773. |
What are Apocrine gland ? |
| Answer» It is found in skin and eyelids as sweat gland......it is also found in ears and helps to form earwax......and also in breast secrete fat droplets into milk.....hope it will help u | |
| 774. |
Will anyone define me glcolysis ? |
| Answer» Glycolysis is the primary stage of cellular respiration that happens when the form of sugar molecules breaks to release energy. Glucose is the most common form of sugar, from which the term glycolysis originates. The metabolic pathway helps in breaking and converting one molecule of glucose- C6H12O6 into two molecules of pyruvate – CH3COCOO− + H+. The total amount of energy, released in the glycolysis process is used to produce energy molecules called ATP (Adenosine triphosphate) along with reduced NADH (nicotinamide adenine dinucleotide). | |
| 775. |
What is muscles contraction ? |
| Answer» It is sliding filament theory, when actin filament slides over myosin,it is only muscle contraction | |
| 776. |
Describe the process of hydroponic? |
| Answer» Hydroponics is the technique of growing plants with their roots immersed in the nutrient solution without soil. It is useful in areas having infertile and dry soils. It is useful to cultivate plants in the areas deficient in one or more nutrient. | |
| 777. |
Can I download videos? |
| Answer» Na analysis.... | |
| 778. |
Which protein makes the eyes of animals cause to glow in night time??? |
|
Answer» Rods Eyes glow because of a layer called lapetum lucidum which is present just behind the retina.This layer reflects the light to make the eyes appear glowing. And it plz.. |
|
| 779. |
Define transpiration pull ??? |
|
Answer» xylem tussues Transpiration pull or the suction force is the force which aids in drawing the water upward from roots to leaves. In leaves, some amount of water is used for photosynthesis and excess water is released into atmosphere through openings called as stomata. |
|
| 780. |
What is middle lammalae? |
|
Answer» Middle lamella is the outermost layer of cell wall shared by adjacent plant cells that glues them together. It is composed of polysaccharides called pectins.The middle lamella is cementing layer between the cells. It is made up of Ca and Mg pectates. The basic chemical unit of pectin is galacturonic acid, which has the capability of salt formation with calcium and magnesium (an acid-base reaction). During cell division in plants a thin sheath forms between cell walls of two cells called middle lamellae. |
|
| 781. |
Why lysosome are called suicidal bag? |
|
Answer» Lysosomes can be termed as waste disposal system of the cell. For almost all type of organic materials they contain digestive enzymes. For example, when cell gets damaged, lysosome may burst and the enzymes digest their own cell. Therefore lysosomes are known as the Suicidal bags of a cell or we can say that they posses different kind of hydrolases on release of these enzymes that cause death of cell. Lysosome itself burst to destroy an unwanted (damaged or teared) cell. So it is called as suicidal bag. |
|
| 782. |
Why dark reaction is called dark reaction |
|
Answer» Dark reaction is also called carbon-fixing reaction. It is a light-independent process in which sugar molecules are formed from the carbon dioxide and water molecules. This reaction occurs in the stroma of the chloroplast where they utilize the products of the light reaction. Plants capture the carbon dioxide from the atmosphere through stomata and proceed to the Calvin cycle. In the Calvin cycle, the ATP and NADPH formed during light reaction drives the reaction and convert 6 molecules of carbon dioxide into one sugar molecule i.e. glucose. Dark rxn occurs in dark (no sunlight) |
|
| 783. |
Why tears are emerge from eyes? |
| Answer» Tears emerge from eyes because while laughing n crying our tear ducts open itself which makes the tears flow from eyes. | |
| 784. |
Difference btw micronutrients and macronutrients.... |
|
Answer» In which quantity they r found in plants?? \tMicronutrientsMacronutrientsRequired in minute quantities.Required in large quantities.Play a pivotal role in disease prevention.Play a pivotal role in providing energy.Deficiency of micronutrients can cause Anaemia, Scurvy, Goitre, etc.Deficiency of macronutrients can cause protein-energy malnutrition, Kwashiorkor, marasmus, etc.Excessive intake of Vitamins harms the liver, mild nerve damage, etc.Excessive intake of macronutrients results in cardiovascular disease, obesity, diabetes, etc.Antioxidants, Minerals, and Vitamins are examples of macronutrients.Proteins, fiber, carbohydrates, and fats are examples of micronutrients.Micronutrients are mainly obtained from vegetables, fruits, cashews, eggs, all dairy products, etc.Macronutrients are mainly obtained from legumes, beans, pulses, soy, tofu, cereals, potatoes, fish as nuts, oilseeds, milk, cheese, etc.Their concentration is less than 1mg/gm.Their concentration is equal to 1 mg or 1000 microgram.Are found in a minute quantity in plants products.Are found abundantly in all plants products.They are trace elements.They are major elements.All micronutrients are minerals.Includes both minerals and non-minerals.\t\xa0 |
|
| 785. |
What is different between simple leaves and compound leave |
| Answer» When a leaf\'s lamina is entire or when incised, its incisions do not touch the midrib, a leaf is said to be simple. But when the incisions of the lamina reach to the midrib breaking the midrib into a number of leaflets, the leaf is said to be compound leaf. | |
| 786. |
The small flower of euphorbia milli is actually a whole inflorescence known as? |
| Answer» Cyathium | |
| 787. |
Where is foramen caecum found in our body |
| Answer» Foramen caecum is found anterior to cribriform plate of ethmoid bone and posterior to frontal bone within the frontoethmoidal suture. | |
| 788. |
Name the tonsil , which is present on tounge after the terminal sulcus.....?? |
| Answer» Lingual tonsil | |
| 789. |
What pearls in mollusca |
|
Answer» Then ...how it become solid ..in the form of pearls?? Water drops that enter into it |
|
| 790. |
Prosenchyma and its function.. |
|
Answer» Thanks? \xa0Prosenchyma: In some cases the parenchymatous cell become long and taper at either end such tissues is called prosenchyma. The cells of this parenchyma are long with pointed ends. This parenchyma forms the pericyle of roots. It comprises loosely woven hyphae lying almost parallel to each other. |
|
| 791. |
Explain crab cycle |
| Answer» Krab cycle is a process in which pyruvi acid goes in a series of reaction to form NADPH ATP GDP which is a energy carrying substance. Krab cycle occur in mitochondria . Kreb cycle is further explained in ncert pg no. 232. | |
| 792. |
Hyoid bone means what |
| Answer» It is a bone present in skull.It is u shaped bone. | |
| 793. |
Describe root region and structure of root hair |
|
Answer» Root cap is present at apical position where as the meristematic region is sub apical Root Cap: The root is covered at the tip by a thimble like structure. This structure is called root cap. The root cap protects the tender root apex when it makes its way through the soil.Region of Elongation: This region lies a few millimeters above the root cap. This is the region of meristematic activity. The cells in this region are very small, have thin wall and dense protoplasm. Since this the meristematic region, so the cells divide rapidly. The cells near this region undergo rapid elongation and enlargement. These cells are responsible for the growth of root in length.Region of Maturation: This region is just above the region of elongation. The cells from the region of elongation differentiate and mature, and then form the region of maturation. The root hairs come out in this region. Root hairs are part of the root epidermis. |
|
| 794. |
Mechanism of opening and closing of stomata. Explain |
| Answer» Stomata are small pores present in the epidermal cells of leaves in plants. Stomata are open during the day and close during night.Stomata take in carbon dioxide required for the photosynthetic activity during the day. They give out excess water released in the process of respiration during night along with carbon dioxide. Opening and closing of stomata is controlled by concentration of solutes in the guard cell.\xa0Mechanism of opening and closing of stomata\xa0Opening of stomata:\xa0Solutes from neighbouring epidermal and mesophyll cells enter the guard cells lowering its osmotic potential and water potential. This lowered water potential and osmotic potential will allow movement of water into guard cells from neighbouring cells. Guard cells become turgid due to water accumulation in them which results in the opening of the guard cells. Closing of stomata:\xa0As the somata open the solute concentration is reduced. This makes the water from the guard cells to move away into neighbouring cells. Now, guard cells becom flaccid with no water. They collapse against each other and result in the closing of stomata.\xa0 | |
| 795. |
Which factors effect rate of diffusion?? |
| Answer» Factors affecting rate of diffusion are as follow:1. Temperature 2. Density3. Medium of diffusion 4. Concentration gradients ? | |
| 796. |
Explain the protein digestion in different parts of ailmentary canal |
| Answer» The digestion of proteins begins in the stomach and is completed in the small intestine. The enzymes that act on proteins are known as proteases.Digestion in\xa0the stomach: The digestive juice\xa0secreted in the gastric glands present on the stomach walls is called gastric juice. The main components of gastric juice are HCl, pepsinogen, and rennin. The food that enters the stomach becomes acidic on mixing with this gastric juice.The acidic medium converts inactive pepsinogen into active pepsin. The active pepsin then converts proteins into proteases and peptides.Proteins {tex}\\begin{array}{l}\\xrightarrow{Pep\\sin}\\\\\\end{array}{/tex} Proteoses + PeptidesThe enzyme rennin\xa0plays an important role in the coagulation of milk.Digestion in\xa0the small intestine: The food from the stomach is acted upon by three juices present in the small intestine – pancreatic juice and intestinal juice (known as succus entericus).Action of pancreatic juicePancreatic juice contains a variety of inactive enzymes such as trypsinogen, chymotrypsinogen, and carboxypeptidases. The enzymes are present in an inactivated state. The enzyme enterokinase secreted by the intestinal mucosa activates trypsinogen into trypsin.Trypsinogen{tex}\\begin{array}{l}\\xrightarrow{\\;Enterokinase}\\\\\\end{array}{/tex}Trypsin + Inactive peptideThe\xa0activated trypsin then activates the other enzymes of pancreatic juice.Chymotrypsinogen\xa0is a proteolytic enzyme that breaks down proteins into peptides.Chymotrypsinogen\xa0{tex}\\begin{array}{l}\\xrightarrow{Tryp\\sin}\\\\\\end{array}{/tex}\xa0ChymotrypsinProteins{tex}\\begin{array}{l}\\xrightarrow{Chymotryp\\sin}\\\\\\end{array}{/tex}\xa0PeptidesCarboxypeptidases act on the carboxyl end of the peptide chain and help in releasing the last amino acids.Peptides{tex}\\begin{array}{l}\\xrightarrow{\\;Carboxypeptidase}\\\\\\end{array}{/tex}Smaller peptide chain + Amino acidsAction of bile juiceBile juice has bile salts such as bilirubin and biliverdin which break down large, fat globules into smaller globules so that pancreatic enzymes can easily act on them. This process is known as emulsification of fats. Bile juice also makes the medium alkaline and activates lipase. Lipase then breaks down fats into diglycerides and monoglycerides.Action of intestinal juiceIntestinal juice\xa0contains a variety of enzymes. Pancreatic amylase digests polysaccharides into disaccharides. Disaccharidases such as maltase, lactase, sucrase, etc., further digest the disaccharides.The\xa0proteases hydrolyse peptides into dipeptides and finally into amino acids.\xa0{tex}\\begin{array}{l}\\xrightarrow{dipeptides}\\\\\\end{array}{/tex} Amino acidsPancreatic lipase breaks down fats into diglycerides and monoglycerides.The nucleases break down nucleic acids into nucleotides and nucleosides.\xa0 | |
| 797. |
Explain the ATP synthesis in mitochondria |
| Answer» Mitochondria produce ATP through process of cellular respiration—specifically, aerobic respiration, which requires oxygen. The citric acid cycle, or Krebs cycle, takes place in the mitochondria. This cycle involves the oxidation of pyruvate, which comes from glucose, to form the molecule acetyl-CoA. Acetyl-CoA is in turn oxidized and ATP is produced.The citric acid cycle reduces nicotinamide adenine dinucleotide (NAD+) to NADH. NADH is then used in the process of oxidative phosphorylation, which also takes place in the mitochondria. Electrons from NADH travel through protein complexes that are embedded in the inner membrane of the mitochondria. This set of proteins is called an electron transport chain. Energy from the electron transport chain is then used to transport proteins back across the membrane, which power ATP synthase to form ATP. | |
| 798. |
Why is abscisic acid also known as stress harmone |
| Answer» Abscisic acid is known as the stress hormone because of the following reasons :1. It helps plant to cope with adverse environmental conditions or stresses.\xa02. It causes temporary closure of stomata due to which there is reduction in the rate of transpiration. Therefore, it acts as antitranspirant and reduces water loss.3. It acts as a general growth inhibtor and inhibitor of plant metabolism.4. It inhibits seed germination. | |
| 799. |
What r crypts?? |
|
Answer» Thanks Crypts of lieberkuhn are present at villi base formed by mucosa help in increase in surface area for absorption. |
|
| 800. |
Explain counter current mechanism |
|
Answer» Thank you! in human kidneys the filtrate which is filtered by glomerullar filtration is is moving in the tubular part of nephron then the capillaries which is surrounding the nephron for reabsorption b/w this two the direction of movement is opposite and this mechanism is called counter current mechanism |
|