biology Questions

QUESTION: Identify the correct statements about biomolecules. A. Lipids are generally water soluble. B. Proteins are polypeptides. C. Polysaccharides are long chains of sugars. D. Adenine and guanine are substituted pyrimidines. E. Almost all enzymes

QUESTION: Match List I with List II : List-I A. Trypsin B. Morphine C. Concanavalin D. Collagen List-II I. Intercellular ground substance II. Lectin III. Enzyme IV. Alkaloid Choose the correct answer from the options given below :

QUESTION: Find the incorrect statement(s) about photosynthesis from the following : A. The water splitting complex is associated with PS-I. B. C₄ plants use the C₃ pathway of CO₂ fixation as the main biosynthetic pathway. C. In C₄ plants, photorespir

QUESTION: Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule ?

QUESTION: Which of the following statements is not true about the universal rules of binomial nomenclature?

QUESTION: Which of the following statements are correct ? A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss. B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by

QUESTION: The main function of bulliform cells in grasses is :

QUESTION: Which one of the following is the site for active ribosomal RNA synthesis ?

QUESTION: Match List I with List II : List I (Placentation) A. Marginal B. Axile C. Parietal D. Basal List-II (Example) I. Mustard II. Pea III. Marigold IV. Lemon Choose the correct answer from the options given below :

QUESTION: Which of the following statements are correct with reference to packaging of DNA helix ? A. Histones are organized to form a unit of eight molecules called histone octamer. B. Histones are negatively charged basic proteins. C. Histones are

QUESTION: In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?

QUESTION: Which of the following statements are correct regarding amino acids ? A. They are substituted methanes. B. Serine is an aromatic amino acid C. Valine is a neutral amino acid D. Lysine is an acidic amino acid Choose the correct answer from t

QUESTION: Match List I with List II : List I A. Productivity B. Net primary productivity C. Gross primary productivity D. Secondary productivity List II I. Gross primary productivity minus respiration losses II. Rate of formation of new organic matte

QUESTION: Heterophyllous development in response to environment is an example of which of the following phenomena?

QUESTION: Which of the following is an in situ conservation method ?

QUESTION: Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?

QUESTION: Which of the following statements are correct with reference to a transcription unit? A. A transcription unit in DNA is defined primarily by three regions: promoter, structural gene and terminator. B. The promoter is said to be located towa

QUESTION: Arrange the following steps of DNA fingerprinting in a correct sequence. A. Isolation of DNA and its digestion by restriction endonucleases. B. Hybridisation using a labelled VNTR probe. C. Transferring of separated DNA fragments to synthet

QUESTION: "The Evil Quartet" of biodiversity loss includes which of the following?

QUESTION: The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included :

QUESTION: Match List I with List II : List I A. Decomposition B. Detritus C. Mineralisation D. Humification List II I. Accumulation of dark coloured amorphous colloidal substance II. Release of inorganic nutrients by the activity of microbes in soil

QUESTION: Which one of the following is a triploid cell ?

QUESTION: Which of the following floral formula is the correct floral formula of Solanaceae family ?

QUESTION: In angiosperms, root hairs arise from which one of the following regions of the root ?

QUESTION: Match List I with List II : List I A. Conjunctive tissue B. Casparian strips C. Subsidiary cells D. Starch sheath List II I. Specialised cells in the vicinity of guard cells II. Endodermal cells rich in starch III. Tissue between xylem and

QUESTION: Arrange the following steps of somatic hybridisation in a correct sequence. A. Digestion of cell walls. B. Isolation of naked protoplasts. C. Fusion of protoplasts to get hybrid protoplast. D. Isolation of single cells from two different va

QUESTION: Which one of the following is not a characteristic of plant cells in the phase of elongation ?

QUESTION: 2(C₅H₈O₅) + 145O₂ → 102CO₂ + 98H₂O + energy The respiratory Quotient (RQ) of a biomolecule used for respiration, as per the above equation would be :

QUESTION: Match List I with List II : List I (Phase of cell cycle) A. G₁ phase B. S phase C. G₂ phase D. M phase List II (Activity) I. Actual cell division occurs II. Cell is metabolically active and continuously grows but does not replicate its DNA

QUESTION: In the lac operon, the z gene codes for :

QUESTION: Which of the following statements are not true regarding restriction endonucleases? A. They are called molecular scissors. B. These are the enzymes responsible for restricting the growth of bacteriophages in E. coli. C. They cut the DNA onl

QUESTION: Arrange the following in the correct developmental sequence related to microsporogenesis : A. Microspore tetrads B. Sporogenous tissue C. Pollen grains D. Pollen mother cells Choose the correct answer from the options given below :

QUESTION: The enzyme required for carboxylation in the Calvin cycle is :

QUESTION: Alpha-helix is found in which level of protein structure?

QUESTION: Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes?

QUESTION: In racemose inflorescence, ________.

QUESTION: Match List I with List II : List I (Growth Regulator) A. 2,4-D B. GA₃ C. Kinetin D. ABA List II (Function/Effect) I. Brewing industry II. Stimulation of stomatal closure III. Herbicide IV. Nutrient mobilisation Choose the correct answer fro

QUESTION: Which of the following statements are true with reference to the sex-determination in honeybees? A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). B. An unfertilized egg develops as a male

QUESTION: Exploring molecular, genetic and species-level diversity for products of economic importance is called :

QUESTION: Match List I with List II : A. Genetically modified organism B. Thermostable DNA polymerase Ti plasmid C. pBR322 D. pBR322 List II I. Agrobacterium tumefaciens II. Bt cotton III. Thermus aquaticus IV. Escherichia coli Choose the correct ans