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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.
| 2851. |
Explane root system? |
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Answer» There are three types of roots 1. Tap root, 2 . Fibrous root, 3 . Adventitious root. Primary root and it\'s branches are taproot, the roots originate from the base of the stem are fibrous root.,roots arise from the plant other than the radicle are adventitious root. Hi Let\'s begin ...2 types of root systems |
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| 2852. |
What is nodule |
| Answer» It is the growth of abnormal tissue | |
| 2853. |
Describe the sequence of the events in mitosis and meiosis 1 |
| Answer» Phases of\xa0mitosis.\xa0Mitosis\xa0consists of four basic phases: prophase, metaphase, anaphase, and telophase.\xa0Meiosis\xa0is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our *** cells – sperm in males, eggs in females. During\xa0meiosis\xa0one celldivides twice to form four daughter cells. There are six stages within each of the divisions, namely prophase, prometaphase,\xa0metaphase,\xa0anaphase,\xa0telophase\xa0and cytokinesis. | |
| 2854. |
structure of GTP |
| Answer» Guanosine triphosphate (GTP) is a guanine\xa0nucleotide\xa0containing three phosphate groups esterified to the sugar moiety.\xa0GTP\xa0functions as a carrier of phosphates and pyrophosphates involved in channeling chemical energy into specific biosynthetic pathways.\xa0GTP\xa0is involved in energy transfer within the cell. For instance, a\xa0GTP\xa0molecule is generated by one of the enzymes in the citric acid cycle. This is tantamount to the generation of one molecule of\xa0ATP, since\xa0GTP\xa0is readily converted to\xa0ATP\xa0with nucleoside-diphosphate kinase (NDK). | |
| 2855. |
Give two name system of organisms |
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Answer» Binomial Nomenclature. Binomial nomenclature and taxonomy |
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| 2856. |
Differentiate b/w monocot stem and dicot stem |
| Answer» View ncert solution from this app ? | |
| 2857. |
Which fish posses electric sting |
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Answer» Torpedo and eel ? Electric eel # TORPEDO # Torpedo |
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| 2858. |
Explain the wooble concept.. |
| Answer» The\xa0Wobble\xa0hypothesis proposes that normal base pairing can occur between nitrogen bases in positions 1 and 2 of the codon and the corresponding bases (3 and 2) in the anticodon. Actually, the base 1 in anticodon can form non-Watson-Crick base pairing with the third position of the codon.\xa0The\xa0wobble effect\xa0is an\xa0effect\xa0caused by the redundancy found in the genetic code. Each amino acid is coded for by a 3 nucleotide sequence on the mRNA. ... Thus, each amino acid can be coded for by more than one codon. For any amino acid, the first 2 nucleotides in the codon are always identical. | |
| 2859. |
Jelly fish and silver fish are not true fishes.Justify.Give some examples of true fishes. |
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Answer» Shut up I love _ ? Difference between you and me |
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| 2860. |
Class 11 halfyearly sullabus |
| Answer» | |
| 2861. |
Five kingdom classification was purpose by |
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Answer» RH whittekar RH Whittaker in 1969 R.H.Whittekar purposed five kingdom classification R.H Whittekat R. H. Whittekar |
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| 2862. |
Mention any two essential factors of imbibition. |
| Answer» Factors affecting the rate of Imbibition\tNature of imbibant:Different types of organic substances have different imbibing capacities. Proteins have a very high imbibing capacity, starch has less capacity and cellulose is the weakest imbiber. That is why proteinaceous pea seeds swell more on imbibition than starchy wheat seeds\tTemperature:The rate of imbibition increases with the increase in temperature.\tConcentration of the solute: Increase in concentration of the solute decreases imbibition due to a decrease in the diffusion pressure gradient between the imbibant and the liquid being imbibed.\tSurface area of imbibant:The imbibition will be greater when the surface area of imbibant is larger. | |
| 2863. |
Compare active transport and facilitated diffusion. |
| Answer» Active transport requires atp while facilated does not. In active the movement is from lower concentration to higher concentration while it is vice versa in faciliated. | |
| 2864. |
Describe the following synapses bivalent chrimata |
| Answer» Synapsis\xa0(also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them.\xa0Synapsis\xa0takes place during prophase I of meiosis. Chiasmata\xa0is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes. The\xa0chiasmata\xa0become visible during the diplotene stage of prophase I of meiosis, but the actual "crossing-overs" of genetic material are thought to occur during the previous pachytene stage. | |
| 2865. |
Which state of interphasr amount of DNA doubles per cell |
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Answer» S phase S phase |
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| 2866. |
Explain the phase of cell cycle with the help of diagram |
| Answer» The\xa0cell cycle\xa0is a 4-stage\xa0process consisting of Gap 1 (G1), Synthesis, Gap 2 (G2) and\xa0mitosis. An active eukaryotic\xa0cell\xa0will undergo these steps as it grows and divides. After completing the\xa0cycle, the\xa0cell\xa0either starts the process again from G1 or exits the\xa0cycle\xa0through G0. | |
| 2867. |
Differentiate between karyokinesis and cytokinesis |
| Answer» Karyokinesis is the division of two nucelei and cytokinesis is the division of cyotoplasm | |
| 2868. |
Define(1) cofactor(2)gycosidic (3)peptide bond (4) phospodiester bond |
| Answer» Cofactors\xa0are not proteins but rather help proteins, such as enzymes, although they can also help non-enzyme proteins as well.\xa0Examples\xa0of\xa0cofactors\xa0include metal ions like iron and zinc.A\xa0peptide bond\xa0is a chemical\xa0bond\xa0formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O). This is a dehydration synthesis reaction (also known as a condensation reaction), and usually occurs between amino acids.\xa0Glycosidic bonds\xa0are the covalent chemical\xa0bonds\xa0that link ring-shaped sugar molecules to other molecules.The\xa0phosphodiester bond\xa0is the\xa0linkage\xa0between the 3\' carbon atom of one sugar molecule and the 5\' carbon atom of another, deoxyribose in DNA and ribose in RNA. | |
| 2869. |
Give the classification of nomenclature of enzyme |
| Answer» EC 2.7.1.1 where EC=enzyme code and 2=class 7=subclass and 1=subsubclass 1=series | |
| 2870. |
Explain the lock and key and induced hypothesisof enzymes action with the help of diagram |
| Answer» The mechanism by which an enzyme binds with the substrate to forward the reaction of producing products can be explained by Lock and key hypothesis and Induced fit mechanism.Lock and Key hypothesis: This hypothesis was putforth by Emil Fischer in 1894. Enzyme has a special site called as active site. the conformation of this active site corresponds to the shape of the substrate which fits into the active site. Enzyme is the lock and substrate is the key. A particular substrate can only fit into active site of the enzyme to form the enzyme substrate complex. (ES complex) This intermediate complex is later broken to form enzyme and the products. Enzyme undergoes no change but helps in forwarding the reaction. This is called as lock and key hypothesis.Induced-Fit mechanism: In this mechanism, the substrate wraps over the enzyme bringing about the change in the enzyme molecule. Here substrate determines the final shape of the enzyme. ES complex is formed after bnding. ES complex breaks to give rise to enzyme and products. Enzyme undergoes no change. Exactly to say the active site is modified during Enzyme-Substrate complex formation. | |
| 2871. |
Give an example quaternary structure protein with brief description |
| Answer» Many\xa0proteins\xa0are actually assemblies of multiple polypeptide chains. The\xa0quaternary structure\xa0refers to the number and arrangement of the\xa0protein\xa0subunits with respect to\xa0one\xa0another.\xa0Examples\xa0of\xa0proteins\xa0with\xa0quaternary structure\xa0include hemoglobin, DNA polymerase, and ion channels. | |
| 2872. |
Mention two secondary metabolism useful for human welfare |
| Answer» The most exciting aspect of chemistry deals with isolating thousands of compounds, small and big, from living organisms, determining their structure and if possible synthesising them.If one were to make a list of biomolecules, such a list would have thousands of organic compounds including amino acids, sugars, etc. For reasons that are given in topic Metabolic basis for living, we can call these biomolecules as metabolites. In animal tissues, one notices the presence of all such categories of compounds shown in Figure 1. These are called primary metabolites. However, when one analyses plant, fungal and microbial cells, one would see thousands of compounds other than these called primary metabolites, e.g. alkaloides, flavonoides, rubber, essential oils, antibiotics, coloured pigments, scents, gums, spices. These are called secondary metabolites | |
| 2873. |
Give the name and draw the structure of a cell organelle that has double unit membrane |
| Answer» Eukaryotic\xa0cells\xa0contain many\xa0membrane-bound\xa0organelles. An organelle is an organized and specialized\xa0structure\xa0within a living\xa0cell. The organelles include the nucleus, ribosomes, endoplasmic reticulum, Golgi apparatus, vacuoles, lysosomes, mitochondria, and, in plants, chloroplasts.\xa0Mitochondria are\xa0double-\xa0membrane-bound\xa0structures. The\xa0membrane\xa0of a mitochondrion is divided into the inner and outer\xa0membranes, distinctly divided into two aqueous compartments – outer and inner compartments. | |
| 2874. |
Describe in brief the fluid mosaic model of plasma membrane |
| Answer» Singer and Nicolson proposed the fluid mosaic model of plasma membrane.\xa0The plasma membrane is composed of a lipid bilayer.The lipid molecules are arranged in such a way that their polar head are towards the outer side and the hydrophobic tails are on the inner side.This arrangement of lipid molecules ensures that the non-polar tail of hydrocarbons does not come in contact with the aquatic environment present.The proteins are of two types. Integral proteins which are either partially or totally embedded in the lipid bilayer and peripheral proteins which are present on the surface of the membrane.The quasi fluid nature of lipid enables the lateral movements of proteins within the lipid bilayer.The fluid nature of the membrane enables functions such as cell growth, secretion, endocytosis, cell division and formation of the intercellular junction. | |
| 2875. |
Why do golgi bodies remain in close Association with endoplasmic reticulum |
| Answer» Actually, golgi apparatus is specialised portion of smooth endoplasmic reticulum meant for cell secretion. it consists of flattened sacs or cisternae, vesicles and large secretary vacuoles.cisternae occur in small stacks .a golgi stack has a convex via face and a concave trans face.cis face is formative it receives vesicles from endoplasmic reticulum which join to form new cisternae of golgi body that\'s why it is associated with endoplasmic reticulum. | |
| 2876. |
Any girl |
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Answer» Hw r u dear Hi raj and honey Hi It means me tumse bhut pyaar krta hun I love u means in hindi please |
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| 2877. |
Compare the structure of muscular tissue with the functions performed by |
| Answer» There are 3 type of musclular tissue 1. Sketal or smooth2.striated or non smooth3.Cardiac muscle Compare points ( which you may include )1.Uninucleated or multinucleated2.branched or unbranced 3. Type of actions : involuntart / voluntary 4.where the nucleus is presenr etc. | |
| 2878. |
Write a short note on born and cartilage |
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Answer» BoneIt is highly rigid connective tissue that forms the skeleton of vertebrates. They are the type of tissues which comprises of blood vessels and cells. Overall a newborn baby will have around 300 bones and is reduced to 206. The main function of bones are:\tServe as a storage of minerals.\tProvide the structural support.\tProtect the internal organs of the body.CartilageIt is thin, fibrous, flexible connective tissue, which is mainly found in the external ear, larynx, respiratory tract, and the articulating surface of the joints. These cartilages lack blood vessels, therefore the growth and development of these tissues are slower compared to the other tissues. Altogether there are three different types of cartilages and it includes:\tHyaline cartilage: It serves as a shock absorber and allows the smooth movement of the bones at joints. They are mainly found in the nose, respiratory tract, and joints\tFibrocartilage is found in the knee, and it is tough and inflexible.\tElastic cartilage is found in ear, epiglottis, and larynx. It is the most flexible cartilage. Bone and catilage |
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| 2879. |
Differentiate between loose and dense connective tissue |
| Answer» \tLoose Connective TissueDense Connective Tissue1. Cells and fibres are arranged loosely in a semi-fluid ground substance.1. Fibres and fibroblasts are compactly arranged.2. Areolar tissue provides the support framework for epithelium.2. Tendons attach skeletal muscles to bones.3. Adipose tissue is specialised to store fats.3. Ligaments help to attach one bone to another.\t | |
| 2880. |
Why are xylem and phloem are called Complex tissue |
| Answer» Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit, to perform the various functions of the xylem and phloem.Xylem helps in conducting water and minerals. It also provides mechanical support to plants. It is made up of the following components:• Tracheids (xylem vessels and xylem tracheids)• Xylem parenchyma• Xylem fibresTracheids are elongated, thick-walled dead cells with tapering ends. Vessels are long, tubular, and cylindrical structures formed from the vessel members, with each having lignified walls and large central cavities. Both tracheids and vessels lack protoplasm. Xylem fibres consist of thick walls with an almost insignificant lumen. They help in providing mechanical support to the plant. Xylem parenchyma is made up of thin-walled parenchymatous cells that help in the storage of food materials and in the radial conduction of water.Phloem helps in conducting food materials. It is composed of:• Sieve tube elements• Companion cells• Phloem parenchyma• Phloem fibresSieve tube elements are tube-like elongated structures associated with companion cells. The end walls of sieve tube elements are perforated to form the sieve plate. Sieve tube elements are living cells containing cytoplasm and nucleus. Companion cells are parenchymatous in nature. They help in maintaining the pressure gradient in the sieve tube elements. Phloem parenchyma helps in the storage of food and is made up of long tapering cells, with a dense cytoplasm. Phloem fibres are made up of elongated sclerenchymatous cells with thick cell walls. | |
| 2881. |
Differentiate open and closed vascular bundle with diagram |
| Answer» \tOpen Vascular BundlesClosed Vascular Bundles1. Cambium is present between the xylem and phloem.1. Cambium is absent.2. It shows the ability of forming secondary xylem and phloem tissues.2. It is not capable of forming the secondary xylem and phloem tissues.3. It is found in dicotyledonous plants.3. It is found in monocotyledonous plants.\t | |
| 2882. |
Different between racemose and cymose inflorescence with example |
| Answer» Racemose Inflorescence1. The formation of flowers is indefinite.2. The main axis does not terminate in a flower and continuous to grow and forms flowers laterally.3. The floral axis is monopodial.Cymose Inflorescence1. The formation of flowers is definite,2. The main axis and its branches terminate in a flower.3. The floral axis is multipodial | |
| 2883. |
Describe various type of placentation with example of each |
| Answer» Placentation :- the arrangement of the ovules within the ovary is known as placentation.placentation are of different types:-1) Marginal2) Axile3) parietal4) free central5) basalMarginal placentation :- In this, the placenta forms a ridge along the ventral suture of the ovary and ovules are borne on the ridge.e.g --> peaAxile placentation :- In this , the placenta is Axile and ovules are attached to it .e g- China rose , tomato , lemonParietal placentation :- in this , the ovules develop on inner wall of the ovary or on peripheral part.e.g -> mustard , ArgemoneFree central placentation :- In this , the ovules are borne on central axis and septa are absent.e.g-> Dianthus and Primrose.basal placentation :- in this , placenta develop at base of ovary & single ovule is attached to it.e g -> sunflower , marigold. | |
| 2884. |
The short note of the region of root with diagram |
| Answer» The\xa0root\xa0tip can be divided into three zones: a zone of cell division, a zone of elongation, and a zone of maturation. The zone of cell division is closest to the\xa0root\xa0tip and is made up of the actively-dividing cells of the\xa0root\xa0meristem, which contains the undifferentiated cells of the germinating plant. | |
| 2885. |
How is key helpful in identification organisms ? |
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Answer» Keys are pairs of two contrasting characters. Selection of one character leads to rejection of another character while identifying a particular species or genera or family and so on.For example presence or absence of hair on body can give a clue if an animal belongs to mammalian or not. Hii |
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| 2886. |
Why we watch dreams during sleep? |
| Answer» | |
| 2887. |
Why yawning come? |
| Answer» One is that when we are bored or tired, we just don\'t breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood. | |
| 2888. |
Bacteria doesn\'t contain mitochondria then how they are getting ATP |
| Answer» Aerobic respiration - as occurs during cellular respiration in eukaryotes - across in bacteria."In Bacteria, Respiratory Functions are Localized to the Plasma Membrane and the Cytoplasm"Bacteria do not have mitochondria, yet most bacterial cells are capable of aerobic respiration.Essentially, the cytoplasm and plasma membrane of a bacterial cell perform the same functions as the mitochondrial matrix and inner membrane, respectively. | |
| 2889. |
Hormone that stimulates spermatogenesis in males and follicular development in ovaries in female is |
| Answer» Spermatogenesis is a concerted sequence of events during maturation of spermatogonia into spermatozoa. The process involves differential gene-expression and cell-cell interplay regulated by the key endocrine stimuli, i.e.,\xa0follicle-stimulating hormone\xa0(FSH) and\xa0luteinizing hormone\xa0(LH)-stimulated\xa0testosterone. In women, this hormone stimulates the growth of ovarian follicles in the ovary before the release of an egg from one follicle at ovulation. It also increases\xa0oestradiol\xa0production. In men, follicle-stimulating hormone acts on the\xa0Sertoli cells\xa0of the testes to stimulate sperm production (spermatogenesis). | |
| 2890. |
What os mammaries? |
| Answer» A\xa0mammary\xa0gland is an exocrine gland in humans and other mammals that produces milk to feed young offspring. Mammals get their name from the Latin word mamma, "breast". In a few mammalian species, male lactation can occur.\xa0Functionally, the\xa0mammary glands\xa0produce\xa0milk; structurally, they are modified sweat\xa0glands.\xa0Mammary glands, which are located in the\xa0breast\xa0overlying the pectoralis major muscles, are present in both sexes, but usually are functional only in the female. | |
| 2891. |
Biomolecules full notes |
| Answer» | |
| 2892. |
What is the function of hypopharynx |
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Answer» Its acts like a human tounge in the cockroaches ?? tongue ?? |
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| 2893. |
How much atp is required for a movement of chromosome |
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Answer» Same as the top one The chromatids are moved towards the pole at a speed of 1 mm/minute. About 30 ATP molecules are used to move one chromosome from equator to pole. 30ATP |
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| 2894. |
What is the largest bacteria |
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Answer» Thiomargarita is the largest bacteria Thiomargarita |
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| 2895. |
Ayush r u here |
| Answer» Yes | |
| 2896. |
What is name when symbiotic association algae with sloth bear? |
| Answer» Clostridium | |
| 2897. |
Name two enzymes where heam is the prosthetic group |
| Answer» Catalyzes and peroxidases referNCERT for this | |
| 2898. |
Write down the zoological name of animals and plants |
| Answer» | |
| 2899. |
What are the different types of vascular bundle |
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Answer» Xylem phloem Xylem and phloem |
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| 2900. |
Formula of chl a and b |
| Answer» Chl a - C55H72O5N4MgChl b - C55H70O6N4Mg | |