Biology Exam Preparation Portal. Preparing with U 4 ur exams...

CSIR-UGC-JRF-NET Life Sciences- Part C Question Pattern

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.

csir notes.jpg
Previous Questions
1. Match the following
A) Azolla 1. Nostoc
B) Casuarina 2. Bradyrhizobium
C) Guneria 3. Anabena
d) Soyabean 4. Frankia


a. A-3,B-2, C-3, D-1
b. A-4, B-3, C-2, D-1
c. A-3, B-1, C-4, D-2
d. A-1, B-2, C-3, D-4

2. Which of the following will have higher transpiration rate?
A: plant in still air
B: plant in turbulent air
C: plants in still air but night

a) A>B>C
b) B>C>A
c) B>A>C
d) C>A>B
3. Consider the following events in history of life?
A) prokaryotic cell
B) eukaryotic cell
C) natural selection
D) organic macromolecules
E) formation of replicating molecule
Which of the following is the correct sequence?
a) D -> E -> A -> C-> B
b) D -> E -> A -> B-> C
c) D -> E -> C -> A-> B
d) E -> C -> A -> B-> D

4. Consider the following pedigree chart
pedigreen
Pedigree
The pedigree chart above can be used to investigate different modes of inheritance such as
A: autosomal dominant
B: autosomal recessive
C: X-linked dominant
D: X-linked recessive
Which of the following modes can be represented by pedigree chart above?
a) A
b) C
c) A and D
d) B and C

5. Which of the following statements are correct regarding plant development
A: Root cap cells are dead cells
B: shoot apical meristem gives shoot axillary meristem
C: Epidermal cells give rise to lateral roots
D: Lateral meristem and radial meristem are responsible for secondary growth in roots
a) A and C
b) B and C
c) A and D
d) 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 thylakoid
B: PS I is preferentially localised in stromal thylakoid
C: Cytochrome b6f complex is not a membrane resident complex
D: PS I is preferentially localised in stromal thylakoid
Which of the following statements are true?
a) A and B
b) A and C
c) B and D
d) B and C

7. Following are some statements regarding plant growth hormones
A: ABA promotes leaf senescence independent of ethylene
B: ABA enhances root growth and decreases shoot growth at low water potential
C: ABA inhibits gibberellin induced seed germination
D: Seed dormancy is controlled by ratio of GA and ABA
Which of the following combination of above statements is correct?
a) B, C and D
b) A, B and D
c) A, C and D
d) 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: TSH
B: thyroid stimulating IgM
C: TRH
D: parathyroid hormone
Which of the following combination of above statements is correct?
a) A and B
b) B and C
c) A and C
d) 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 dehydrogenase
B: retinal synthase
C: retinal isomerase
D: retinal reductase
Which is the correct reason for night blindness in above case?
a) D only
b) C and D
c) A only
d) 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->FADH2
b) NAD->NADH, FAD->FADH2, GDP->GTP, FAD->FADH2
c) NAD->NADH, NAD->NADH, GDP->GTP, FAD->FADH2
d) 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 forest
B) 150 C and 150 cm 2. Savannah
C) 150 C and 100 cm 3. Temperate rain forest
d) 250 C and 255 cm 4. Tropical rain forest
The correct combinations are
a. A-4,B-3, C-1, D-2
b. A-3, B-4, C-2, D-1
c. A-2, B-1, C-3, D-4
d. 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 individuals
3: Extent of area occupancy below 100 Sq Km
4: probability of extinction in wild at least 50% in upcoming 10 years
As per IUCN red data book, the organism would be kept in category of
a) Endangered
b) Vulnerable
c) Extinct in wild
d) Critically endangered

13. Identify a, b, and c from the cladogram
cladogram
Cladogram
a) diatoms b) rhodobacter
b) cyanobacteria c) porifera
viruses
a) a-plastid, b-mitochondria,c-multicellularity
b) a-mitochondria, b- multicellularity,c-plastid
c) a-plastid, b- multicellularity,c- mitochondria
d) 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) Azotobacter
Which 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 abscission
B: Gibberilins do not play any role in flowering
C: Auxin and cytokinin promote cell division
D: Overexpression of cytokinin oxidase would promote root growth
E: ABA enhances root growth and decreases shoot growth at low water potential
F: ABA promotes leaf senescence independent of ethylene
Which of the following combination of above statements is correct?
a) A, C and F
b) B, C and D
c) D, E and F
d) B, D and E
Answers:
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

For More


Sharing is Caring ..... Please take 5 seconds to Share. Thank you...

© Biology Exams 4 U, AllRightsReserved.***Best viewed in Google Chrome and Mozilla firefox***

Maintained by BiologyExams4U.com