CSIR Life Science 2014 Past Paper Questions (Previous Year Papers) Part 1

Glide to success with Doorsteptutor material for CSIR : get questions, notes, tests, video lectures and more- for all subjects of CSIR.

1. Which of the following statements is NOT correct regarding effect of genetic drift?

1. It alters allele frequency substantially only in small population.

2. It can cause allele frequencies to change at random.

3. It can lead to a loss of genetic variation within populations.

4. It can cause harmful alleles to become eliminated

2. Which of the following is NOT a benefit for the female adopting polyandry?

1. Greater probability of getting all her eggs fertilized.

2. Ability to receive more resources from the males.

3. Ability to produce more offspring than normal.

4. Improved chances of genetic compatibility with her own DNA.

3. Following is a table showing selected characteristics of important fungal groups.

Fungal group Characteristic

A. No regularly occurring septa in thallus

B. Perforated septa

C. Forms arbuscular mycorrhizae on plant roots

D. Have zoospores with flagella

In the above table, the fungal groups A, B, C and D, are, respectively,

1. Chytridiomycetes, Ascomycetes, Glomeromycetes, zygomycetes

2. Zygomycetes, Ascomycetes, Glomeromycetes, Chytridiomycetes

3. Ascomycetes, Zygomycetes, Glomeromycetes, Chytridiomycetes

4. Chytridiomycetes, Zygomycetes, Ascomycetes, Glomeromycete

4. Which of the following is a correct statement?

1. Euglenids have spiral or crystalline rod inside flagella

2. Pheophytes have a spiral or crystalline rod inside flagella.

3. Euglenids have a hairy and smooth flagellum.

4. Euglenids and Pheophytes both have a spiral or crystalline rod inside flagella.

5. Which of the following statements best describe archaebacteria?

1. Mostly autotrophic, cell wall contains peptidoglycan, 60S ribosomes, live in extreme environment.

2. Divide by fission, not susceptible to lysozyme, live in extreme environments, mostly autotropic.

3. Not susceptible to lysozyme, contain Golgi and linear chromosomes.

4. Chitinous cell wall, obligate aerobic, circular chromosomes.

6. Which one of the following statements regarding seed germination of a wild type plant is NOT correct?

1. Low ABA and high bioactive GA can break seed dormancy.

2. Light accompanied with high temperature can break seed dormancy.

3. GA induces synthesis of hydrolytic enzymes in cereal grains

4. Degradation of carbohydrates and storage proteins provide nourishment and energy to support seedling growth

35. Which one of the following is a type of intercellular junction in animal cells?

1. Middle lamella

2. Plasmodesmata

3. Desmosomes

4. Glycocalyx

36. Which one of the following is NOT related to immediate hypersensitivity reactions?

1. Mast cell degranulation results in histamine-mediated allergic reactions.

2. Reaginic antibodies trigger allergic reactions.

3. Granulomatous reaction is a key to contain infection.

4. Anaphylactic reaction is triggered primarily by IgE

37. During the operation of C2 oxidative photosynthetic cycle, which of the following metabolites is transported from chloroplast to peroxisome?

1. Glycerate

2. Serine

3. Glycine

4. Glycolate

38. The organs ‘radula’ and ‘clitellum’ are found in

1. Coelenterata and Echinodennata, respectively.

2. Echinodennata and Coelenterata, respectively

3. Annelida and Mollusca, respectively.

4. Mollusca and Annelida, respectively

39. A few events in the history of life on earth are given below

A. Radiation of mammals and bird; Flourishing of insects and angiosperms

B. Primitive plants and fungi colonize land; Diversification of echinoderms.

C. Seed plants appear; Fishes and Trilobites abundant; earliest amphibians and insects.

D. Earliest birds and Angiosperms appear; Gymnosperms dominant

E. Invasion of land by primitive land plants and Arthropods

F. Mass marine extinctions; Reptiles radiate; Amphibians decline.

Which of the following is a correct match of the above events with the geological period during which they had occurred?

1. A: Ordovician; B: Tertiary; C: Permian; D: Silurian E: Devonian; F: Jurassic

2. A: Permian; B: Devonian; C: Silurian; D: Ordovician; E: Tertiary; F: Jurassic

3. A: Tertiary; B: Ordovician; C: Devonian; D: Jurassic; E: Silurian; F: Permian

4. A: Permian; B: Devonian; C: Jurassic; D: Tertiary; E: Silurian; F: Ordovician

40. The following statements are related to excretion in invertebrates:

I. Flame cells are found in molluscs and jelly fish.

II. Nephridia and Malpighian tubules convert ammonia to urea for water conservation.

III. Green glands are found in flatworm and help in the excreta elimination.

IV. Excretory canals in nematodes carry waste materials to excretory pores in the body wall. Choose the correct answer

1. Only III

2. A and III

3. Only II

4. II and IV