All these questions are form previous CSIR question papers. I have selected questions of a specific pattern. To answer these questions, an in-depth knowledge in the topic is required. The number of questions of this pattern has dramatically increased in the last two years. My suggestion is work out the questions before jumping into answer section. Read and reread the question. Don’t rush to pick one, think, analyse and fix the right option. All the very best.
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| Previous Questions |
1. Match the following
A) Azolla 1. NostocB) Casuarina 2. BradyrhizobiumC) Guneria 3. Anabenad) Soyabean 4. Frankia
a. A-3,B-2, C-3, D-1b. A-4, B-3, C-2, D-1c. A-3, B-1, C-4, D-2d. A-1, B-2, C-3, D-4
2. Which of the following will have higher transpiration rate?
A: plant in still airB: plant in turbulent airC: plants in still air but night
a) A>B>Cb) B>C>Ac) B>A>Cd) C>A>B
A) prokaryotic cellB) eukaryotic cellC) natural selectionD) organic macromoleculesE) formation of replicating moleculeWhich of the following is the correct sequence?a) D -> E -> A -> C-> Bb) D -> E -> A -> B-> Cc) D -> E -> C -> A-> Bd) E -> C -> A -> B-> D
4. Consider the following pedigree chart
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| Pedigree |
The pedigree chart above can be used to investigate different modes of inheritance such as
A: autosomal dominantB: autosomal recessiveC: X-linked dominantD: X-linked recessiveWhich of the following modes can be represented by pedigree chart above?a) Ab) Cc) A and Dd) B and C
5. Which of the following statements are correct regarding plant development
A: Root cap cells are dead cellsB: shoot apical meristem gives shoot axillary meristemC: Epidermal cells give rise to lateral rootsD: Lateral meristem and radial meristem are responsible for secondary growth in rootsa) A and Cb) B and Cc) A and Dd) B and D
6. Consider the following statements regarding position of components of photosystem in chloroplast of plant
A: PS I and PS II are co-localised in stromal thylakoidB: PS I is preferentially localised in stromal thylakoidC: Cytochrome b6f complex is not a membrane resident complexD: PS I is preferentially localised in stromal thylakoidWhich of the following statements are true?a) A and Bb) A and Cc) B and Dd) B and C
7. Following are some statements regarding plant growth hormones
A: ABA promotes leaf senescence independent of ethyleneB: ABA enhances root growth and decreases shoot growth at low water potentialC: ABA inhibits gibberellin induced seed germinationD: Seed dormancy is controlled by ratio of GA and ABAWhich of the following combination of above statements is correct?a) B, C and Db) A, B and Dc) A, C and Dd) A, B and C
8. A woman patient suffering from thyrotoxicosis shows high level of thyroxine in the blood which is attributed to failure in feed back inhibition in hypothalamic-pituatory-thyroxine circuit. If we further check blood in detail, patient will also show high level of
A: TSHB: thyroid stimulating IgMC: TRHD: parathyroid hormoneWhich of the following combination of above statements is correct?a) A and Bb) B and Cc) A and Cd) B and D
9. A person suffering from night blindness moves to doctor. Doctor initially advised patient to consume more of fish oil but one month later seeing no improvement Doctor give him injection of Vitamin A. Still there was no improvement in visibility. The probable reason for failure of both treatments may be lack of any of the enzyme given below
A: retinol dehydrogenaseB: retinal synthaseC: retinal isomeraseD: retinal reductaseWhich is the correct reason for night blindness in above case?a) D onlyb) C and Dc) A onlyd) B and C both
10. The following represents some steps in Krebs cycle
Isocitrate->α-KGA-> Succinyl CoA-> Succinate->Fumarate
Which of the following is correct for each step?
a) NAD->NADH, NAD->NADH, ADP->ATP, FAD->FADH2b) NAD->NADH, FAD->FADH2, GDP->GTP, FAD->FADH2c) NAD->NADH, NAD->NADH, GDP->GTP, FAD->FADH2d) NAD->NADH, FAD->NADH2, ADP->ATP, NAD->NADH
11. Match the following temperature and rainfall with suitable biomes check question
A) 250 C and 255 cm 1. Temperate forestB) 150 C and 150 cm 2. SavannahC) 150 C and 100 cm 3. Temperate rain forestd) 250 C and 255 cm 4. Tropical rain forestThe correct combinations area. A-4,B-3, C-1, D-2b. A-3, B-4, C-2, D-1c. A-2, B-1, C-3, D-4d. A-1, B-4, C-2, D-3
12. The following are characteristics of a threatened animal
1: population declined 90%2: population below 50 individuals3: Extent of area occupancy below 100 Sq Km4: probability of extinction in wild at least 50% in upcoming 10 yearsAs per IUCN red data book, the organism would be kept in category ofa) Endangeredb) Vulnerablec) Extinct in wildd) Critically endangered
13. Identify a, b, and c from the cladogram
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| Cladogram |
a) diatoms b) rhodobacterb) cyanobacteria c) poriferavirusesa) a-plastid, b-mitochondria,c-multicellularityb) a-mitochondria, b- multicellularity,c-plastidc) a-plastid, b- multicellularity,c- mitochondriad) a- mitochondria, b-plastid,c-multicellularity
14. In the global nitrogen cycle, the following microbes are involve in three important process-denitrification, nitrification and nitrogen fixation
a) Rhizobium, b) Nitrosomonas, c) Nitrobacter, d) Psuedomonas, e) AzotobacterWhich of the following is the correctly matched pair of process and its causative species?1) Denitrification-(b); nitrogen fixation-(c) and (e); nitrification-(d)2) Denitrification-(d); nitrogen fixation-(a) and (e); nitrification-(c)3) Denitrification-(e); nitrogen fixation-(a) and (d); nitrification-(d)4) Denitrification-(b); nitrogen fixation-(a) and (d); nitrification-(c)
15. Following are some statements regarding plant growth hormones
A: Ethylene regulates abscissionB: Gibberilins do not play any role in floweringC: Auxin and cytokinin promote cell divisionD: Overexpression of cytokinin oxidase would promote root growthE: ABA enhances root growth and decreases shoot growth at low water potentialF: ABA promotes leaf senescence independent of ethyleneWhich of the following combination of above statements is correct?
Answers:a) A, C and Fb) B, C and Dc) D, E and Fd) B, D and E
1. c. A-3, B-1, C-4, D-2
2. c) B>A>C
3. c) D -> E -> C -> A-> B
4. a) A
5. d) B and D
6. b) A and C
7. c) A, C and D
8. b) B and C
9. c) A only
10. c) NAD->NADH, NAD->NADH, GDP->GTP, FAD->FADH2
11. b. A-3, B-4, C-2, D-1
12. d) Critically endangered
13. d) a- mitochondria, b-plastid,c-multicellularity
14. 2) Denitrification-(d); nitrogen fixation-(a) and (e); nitrification-(c)
15. a) A, C and F
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