Dibrugarh University Question Paper - Zoology – Science - (Nov'2018)

2018 (November)



Course: 301

(Chordate Diversity and Developmental Biology)

Full Marks: 48

Pass Marks: 14

Time: 2 hours

The figures in the margin indicate full marks for the questions

(New Course)

1. (a) Fill in the blanks:                                                   1x5=5

1)         Worm like hemichordates are included in the class _________.

2)         In higher chordates, the anterior end of the spinal cord enlarges to form _________.

3)         Chordates with jaws are called as _________.

4)         The number of canines on each side of each jaw in mammals is _________.

5)         In fishes and Amphibia, fertilization is _________.

(b) Write short notes on (any two):                     4x2=8

1)         Primates.

2)         Cleavage.

3)         Fish migration.

4)         Indian poisonous.

2. What is Protochordata? Classify Hemichordata up to classes with example and write four distinctive characters of Hemichordata.                                  1+4+2=7

3. What is parental care? Describe parental care in Amphibia with example.                         1+6=7


Classify with characters of living Reptilia up to orders with example.                  7

4. What is perching? Describe the flight mechanism in bird with diagram.                               1+6=7


What is beak in bird? Describe various types of beak in bird.                    1+6=7

5. What do you mean by gametogenesis? Explain different types of eggs depending upon the amount and distribution of yolk with example.                                          2+5=7


Explain the process of spermatogenesis with diagram.                                               7

6. What are germ layers? Discuss about different types of extra-embryonic membranes.          1+6=7


What is parthenogenesis? Describe the mechanism of fertilization.                      1+6=7

(Old Course)

(Cell Biology and Biochemistry)

Full Marks: 48

Pass Marks: 19


(Cell Biology)

Marks: 24

1. Choose the correct answer:                                   1x4=4

a)         Nuclear membrane is absent in

1)         Animal cell.

2)         Plant cell.

3)         Prokaryotic cell.

4)         Eukaryotic cell.

b)         Mitochondria are absent in

1)         Bacteria.

2)         Amoeba.

3)         Red Algae.

4)         Animals.

c)          Second meiotic division is similar to

1)         Amitosis.

2)         Mitosis.

3)         Primary fission.

4)         First meiotic division.

d)         Cell organelle that takes part in protein synthesis is

1)         Lysosome.

2)         Golgi body.

3)         Ribosome.

4)         Chromosome.

2. Distinguish between (any two):                           2x2=4

a)         Prokaryotic cell and Eukaryotic cell.

b)         Cell cycle and Cell division.

c)          Meiosis-1 and Meiosis-2.

3. Draw a neat labeled diagram of the structure of mitochondria and describe its four main functions. Why is mitochondria called as ‘power house’ of a cell?                                  2+4+2=8


Explain the stages of cell cycle with suitable diagram.                               8

4. Describe the process of mitosis with labeled diagram.                                   8



Marks: 24

5. Fill in the blanks:                                 1x4=4

a)         Chemically enzymes are _________ in nature.

b)         The number of nitrogenous bases in DNA is _________.

c)          The chemical name of vitamin A is _________.

d)         RNA is polymer of purine, pyrimidine and _________ sugar.

6. Write very brief answer:                                          1x4=4

a)         What are fat-soluble vitamins?

b)         What is meant by prosthetic group?

c)          Why are enzymes called as biocatalyst?

d)         What is fat?

7. Distinguish between:                                            4x2=8

a)         pH and Buffer.

b)         DNA and RNA.

8. What are carbohydrates? Explain various types of carbohydrates with examples.            1+7=8


Explain Krebs cycle with diagram.                         8



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