Description : Inactive precursors of enzymes are known as (A) Apoenzymes (B) Coenzymes (C) Proenzymes (D) Holoenzymes
Last Answer : Answer : C
Description : Coenzymes combine with (A) Proenzymes (B) Apoenzymes (C) Holoenzymes (D) Antienzymes
Last Answer : Answer : B
Description : Multiple forms of the same enzymes are known as (A) Zymogens (B) Isoenzymes (C) Proenzymes (D) Pre-enzymes
Description : Enzymes functional in cell or mitochondria are (A) Endoenzymes (B) Exoenzymes (C) Apoenzymes (D) Holoenzymes
Last Answer : Answer : A
Description : Enzymes which are always present in an organism are known as (A) Inducible enzymes (B) Constitutive enzymes (C) Functional enzymes (D) Apoenzymes
Description : Enzymes having slightly different molecular structure but performing identical activity are (a) holoenzymes (b) isoenzymes (c) apoenzymes (d) coenzymes.
Last Answer : (b) isoenzymes
Description : Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.
Last Answer : (b) they (prosthetic groups) are tightly bound to apoenzymes
Description : Cytotoxic T cells release which 2 toxic proteins as they fight target cells? a. histamine and heparin b. perforin and granzymes c. interleukin and interferon d. lysozymes and cytokines
Last Answer : b. perforin and granzymes
Description : Natural killer (NK) cells kill by secreting a. Lysozymes. b. Granzymes. c. Defensins. d. Interferons.
Last Answer : b. Granzymes.
Description : Proenzymes: (A) Chymotrysinogen (B) Pepsinogen (C) Both (A) and (B) (D) None of these
Description : IgG cleaved by papain into (A) Two light and two heavy chains (B) Two Fab and one Fc fragments (C) Two pairs of one light and one heavy chain each (D) One Fab and two Fc fragments
Description : Inactive zymogens are precursors of all the following gastrointestinal enzymes except (A) Carboxypeptidase (B) Pepsin (C) Amino peptidase (D) Chymotrypsin
Description : In I-cell disease, lysosomal enzymes (A) Are not synthesised (B) Are inactive (C) Lack signal sequence (D) Cannot reach lysosomes
Description : Living cells have the unique ability to synthesize only _________ the form of optical isomer due to _________. (A) ‘d’ form, stereospecific enzymes (B) ‘l’ form stereospecific enzymes (C) ‘d’ form, DNA (D) ‘L’ form, DNA
Description : .Viruses that infect bacteria multiply and cause their lysis, are called (a) lysozymes (b) lipolytic (c) lytic (d) lysogenic
Last Answer : (c) lytic
Description : In plants, enzymes occur in (A) Flowers only (B) Leaves only (C) All living cells (D) Storage organs only
Description : Lysozymes are found in
Last Answer : Lysozymes are found in A. In saliva and tears both B. In tears C. In saliva D. In mitochondria
Description : The chemical used for better colour and keeping quality of papain
Last Answer : Ans. Potassium meta-bi-sulphite (KMS)
Description : Highest papain yielding variety
Last Answer : Ans. Pusa majesty
Description : The following are true about the Fc regions of an immunoglobulins: a. they can be cleaved from the Fab regions by papain b. they are involved in mast cell binding c. they are involved in the activation of the complement cascade d. all above
Last Answer : all above
Description : Enzymes are A- organic compounds produced by living organism B- .inorganic compounds C- organic as well as inorganic compounds D- all of these
Last Answer : organic compounds produced by living organism
Description : A biocontrol agent to be a part of an integrated pest management should be (a) species-specific and symbiotic (b) free living and broad spectrum (c) narrow spectrum and symbiotic (d) species-specific and inactive on non-target organisms.
Last Answer : (d) species-specific and inactive on non-target organisms.
Description : An attenuated vaccine contains a. Inactive toxins. b. Living, but slow growing (replicating) antigens. c. Killed bacteria. d. Noninfective antigen subunits.
Last Answer : b. Living, but slow growing (replicating) antigens.
Description : Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of (a) M phase (b) G1 phase (c) S phase (d) G2 phase.
Last Answer : (b) G1 phase
Description : In roots, mitotically and metabolically inactive cells that are positioned just behind the root cap are called as
Last Answer : In roots, mitotically and metabolically inactive cells that are positioned just behind the root cap are called as – Quiescent center
Description : All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids ( ... for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form
Description : All the following statements about acetyl CoA carboxylase are true except: (A) It is activated by citrate (B) It is inhibited by palmitoyl CoA (C) It can undergo covalent modification (D) Its dephosphorylated form is inactive
Last Answer : Answer : D
Description : Pentagastrin is a (A) Naturally occurring form of gastrin (B) Inactive metabolite of gastrin (C) Active metabolite of gastrin (D) Synthetic form of gastrin
Description : Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity
Description : Which of the following statements is true? (A) Enzymes have names ending ase (B) Enzymes are highly specific in their action (C) Enzymes are living organisms (D) Enzymes get activated on heating
Description : Regarding the human chromosomes a. there are 23 pairs autosomal chromosomes b. the Y chromosome is larger than the X chromosome c. cells containing YO chromosome are not compatible with life d. Barr body is caused by the presence of an inactive X chromosome
Last Answer : cells containing YO chromosome are not compatible with life
Description : What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor? (a) In the absence of HCl secretion, inactive pepsinogen is not converted into the active ... c) Gastric juice will be deficient in chymosin. (d) Gastric juice will be deficient in pepsinogen.
Last Answer : (a) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
Description : The percentage of inactive precursors (monoidotyrosine and diiodotyrosine) in thyroglobulin is (A) 30 (B) 40 (C) 50 (D) 70
Description : The free fatty acids in blood are (A) Stored in fat depots (B) Mainly bound to β-lipoproteins (C) Mainly bound to serum albumin (D) Metabolically most inactive
Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine
Description : Reactivation of inactive liver phosphorylase is normally favoured by (A) Insulin (B) Epinephrine (C) ACTH (D) Glucagon
Last Answer : D
Description : Which amino acid is optically inactive?
Last Answer : Glycine.
Last Answer : (A) Glycine
Description : In the process of transcription in bacterial cells (A) Initiation requires rho protein (B) RNA polymerase incorporates methylated bases in correct sequence (C) Both the sigma unit and core ... RNA polymerase are required for accurate promotor site binding (D) Primase is necessary for initiation
Description : A bio-catalyst produced by living cells which acts independent of the cell is called a/an (A) Substrate (B) Enzyme (C) Nutrient (D) None of these
Last Answer : (B) Enzyme
Description : Name of the inactive form of Pepsin. -Biology
Last Answer : answer:
Description : What is true about Bt toxin? (a) Bt protein exists as active toxin in the Bacillus. (b) The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication. ... Bacillus has antitoxins. (d) The inactive protoxin gets converted into active form in the insect gut.
Last Answer : (d) The inactive protoxin gets converted into active form in the insect gut.
Description : Which is associated with a steroid hormone? A) cyclic AMP B) the second messenger system C) production of new proteins D) activation of proteins present in an inactive form E) binding of a protein to a surface receptor on the plasma membrane
Last Answer : C) production of new proteins
Description : Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.
Last Answer : (a) help in regulating metabolism
Description : The major role of minor elements inside living organisms is to act as (a) co-factors of enzymes (b) building blocks of important amino acids (c) constituent of hormones (d) binder of cell structure.
Last Answer : (a) co-factors of enzymes
Description : Enzymes are (A) Proteins with high molecular weight (around 10,000) (B) Derived from living organisms (C) Catalyst for temperature sensitive reactions (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Read the following four statements (A-D) about certain mistakes in two of them. (A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched. (B) Restriction enzymes are used in isolation of DNA ... mistakes? (a) B and C (b) C and D (c) A and C (d) A and B
Last Answer : (d) A and B
Description : What is common among amylase, rennin and trypsin? (a) These are produced in stomach. (b) These act at a pH lower than 7. (c) These all are proteins. (d) These all are proteolytic enzymes.
Last Answer : (c) These all are proteins.
Description : Which of the following is produced from pancreas (a) 3 digestive enzymes and 3 hormone (b) 2 digestive enzymes and I hormone (c) 3 digestive enzymes and 2 hormone (d) 3 digestive enzymes and I hormone
Last Answer : (c) 3 digestive enzymes and 2 hormone
Description : The coils of spring which are in contact with the seat and do not contribute to spring action are called (A) resting coils (B) static coils (C) inactive coils (D) ideal coils
Last Answer : (C) inactive coils