Biotechnology
Biotechnology Antibiotics and Pigments etcBiochemistryMicrobiologyMolecular Biology and GeneticsBiotechnology
Questions
Microbes used as single-cell proteins (SCPs) are:
- Chlorella, Spirulina, Yeasts
- Propionibacterium, Jatropha, Hevea brasiliensis
- Agrobacterium tumifacium, Spirulina, Hevea brasiliensis
- Propionibacterium, Agrobacterium tumifacium, Yeasts
- Chlorella, Spirulina, Agrobacterium tumifacium
The actinobacteria of the genus Streptomyces are of immense importance to both ecological and human welfare. Which of the following antibiotics are derived from the members of genus Streptomyces?
- Penicillin, Streptomycin, Griseofulvin
- Chloramphenicol, Griseofulvin, Oxytetracycline
- Streptomycin, Chloramphenicol, Oxytetracycline
- Streptomycin, Oxytetracycline, Bacitracin
- Griseofulvin, Chloramphenicol, Penicillin
Which of the following is a pair of starch-debranching enzymes?
- Glucoamylase and pullulanase
- Glucoamylase and amylase
- Pullulanase and isoamylase
- Isoamylase and amylase
- Glucose isomerase and amylase
Which of the following statements is true regarding enzymes?
- Induced fit theory of enzymes was given by Emil Fischer.
- Michaelis constant is the substrate concentration at which enzyme reaction proceeds at half the maximum velocity.
- Synthesis of enzymes is directed by tRNA.
- Enzymes exists in cells as solids.
- Zymogen is an enzyme.
Clones can be obtained by:
- tissue culture, micro-propagation and asexual reproduction
- tissue culture, micro-propagation and somatic hybridization
- transplantation, micro-propagation and somatic hybridization
- recombinant DNA technology, tissue culture and somatic hybridization
- recombinant DNA technology, asexual reproduction and transplantation
Mendel studied seven contrasting characters for his breeding experiment with Pisum sativum. Which of the following characters did he identify as dominant characters?
- Yellow colour of seeds, white colour of flower, inflated seed pods
- Green colour of unripe pods, axillary position of flowers, round shape of seeds
- Tall stem, constricted seed pods, terminal position of flowers
- Green colour of seeds, purple colour of flower, inflated seed pods
- Yellow colour of unripe pods, axillary position of flowers, round shape of seeds
Which of the following is not correctly matched?
- Bordeaux mixture: Fungicide
- Sodium chlorate: Herbicide
- Zinc sulphide: Rodenticide
- Atrazine: Nematicide
- DDT: Insecticide
Which of the following enzymes is derived from Bacillus licheniformis?
- β-glucanase
- Pullulanase
- Penicillin amidase
- Alkaline protease
- Neutral protease
Which of the following microbes are used in preparation of yoghurt?
- Lactobacillus bulgaricus and Streptococcus thermophilus
- Leuconostoc mesenteroids and Enterobacter aerogenes
- Enterobactor aerogens and Fusarium moniliforme
- Streptococcus lactis and Leuconostoc citrovorus
- Fusarium moniliforme and Streptococcus thermophilus
Which of the following sets represents natural insecticides obtained from plants?
- Pyrethrum, carbaryl, malathion
- Azadirachtin, rotenone, carbaryl
- Rotenone, pyrethrum, endosulphan
- Carbaryl, endosulphan, lindane
- Azadirachtin, rotenone, pyrethrum
Which of the following statements is incorrect?
- Insulin is secreted by the by β-cells of islets of Langerhans.
- Human insulin is a polypeptide of 51 amino acids arranged in a single chain.
- Banting and Best isolated insulin from dog’s pancreas.
- Insulin regulates carbohydrate metabolism.
- Humulin is synthetic human insulin.
Which of the following is a set of organisms with bioherbicide property?
- Crotalaria juncea, Trifolium alexandriunum, Medicago sativum
- Azolla pinnata, Trifolium alexandriunum, Chrysolina beetles
- Metarhizium flavoride, Medicago sativum, Crotalaria juncea
- Cactoblastes cactorum, Chrysolina beetles, Metarhizium flavoride
- Trifolium alexandriunum, Cactoblastes cactorum, Azolla pinnata
Which of the following matches of ‘Nobel laureates and their work’ is incorrect?
- E.B. Lewis, E. Weischaus, C. Nusselein-Volhard : Genetic control of embryonic development
- Sydney Brenner, John E. Sulston , H. Robert Horitz : Genetic regulation of organ development and programmed cell death
- R. Holly, H.G. Khorana and M.W. Nirenberg : Genetic code and base sequence of t-RNA
- A. Korenberg and S. Ochoa : Operon model of gene control
- James Watson, Francis Crick and Maurice Wilkins : Double helix structure of DNA
Which of the following matches of enzyme and its use is not correct?
- Streptokinase: Lysis of blood clots
- Rennin: Cheese production
- Cellulase: Fruit and vegetable processing
- Lipase: Fat and oil processing
- Acidic protease: Detergent making
Which of the following is an incorrectly matched pair?
- J. Sumner – Crystallization of first enzyme
- F.A. Lipmang – Discovery of coenzyme-A and its role in metabolism
- E. Fischer and Krebs - Alteration of enzyme activity by phosphorylation/ dephosphorylation
- F. Sanger - Action of enzymes
- W. Arber, D. Nathans and Hamilton O. Smith – Discovery of restriction enzymes