Sunday, October 25, 2020

2019 March | HSE +2 Exam | Zoology Question Paper

2019 March
PART B: ZOOLOGY

(Maximum: 30 Scores)

Answer all questions from 1 to 3. Each carries 1 score. (3 x 1 = 3)

1. Which among the following belongs to ex-situ conservation?

Wildlife sanctuaries, Biosphere reserves, Zoological parks, National parks, Sacred groves

2. The milk produced during the initial few days of lactation is called .......................

3. Diagrammatic representation of the central dogma given below is not correct. Make necessary corrections and redraw it.


Answer any 9 questions from 4 to 14. Each carries 2 score. (9 x 2 = 18)

4. Prepare a flow chart showing the evolution of modern man in the hierarchical order of their evolution using the details given below:

Homo erectus, Homo habilis, Dryopithecus, Australopithecines, Homo sapiens, Ramapithecus, Neanderthal man 

5. Observe the figure given below:


a. Identify the figure.
b. How many histone molecules are present in the Histone core.
c. Distinguish Euchromatin and Heterochromatin.

6. Some examples of evolutionary structures are given below. Classify them under suitable headings:

a. Forelimb of Man, Cheetah, Whale, Bat.
b. Wings of Butterfly, Bird.
c. Thorns and tendrils of Bougainvillea and Cucurbita.
d. Vertebrate hearts or brains.
e. Eye of the Octopus and Mammals.
f. Flippers of Penguins and Dolphins.

7. "The sex of the baby is determined by the father and not by the mother." Do you agree with this statement ? Substantiate your answer.

8. Find the odd one out. Justify your answer.

Down's syndrome, Turner's syndrome, Phenylketonuria, Klinefelter's syndrome. 

9. Observe the diagram given below showing the sectional view of the female reproductive system and name the parts labelled 'A', 'B', 'C' & 'D'.

 

10. Microbes are useful to human beings in diverse ways. If so, name the following.

a. Microbe known as "Baker's Yeast".
b. Lactic acid producing bacterium.
c. Fungus which helps in the production of bio-active molecule - cyclosporine A.
d. Symbiotic nitrogen fixing bacterium.

11. Complete the flow chart given below:

 

12. A wide range of contraceptive methods are presently available. If so,

a. Name one contraceptive method having least side effect.
b. Which contraceptive method is generally advised for females as a termination method to prevent any more pregnancies?
c. List out any two possible ill-effects of the usage of contraceptive methods.

13. The causes of biodiversity loss are designated as "EVIL QUARTET". Explain the Evil Quartet in biodiversity loss.

14. List of some diseases commonly occurring in man are given below. Arrange them based on causative organism in the table.

Malaria, Common cold, Filariasis, Typhoid, Ascariasis, Ringworms, Amoebiasis, Pneumonia 

Bacteria

Fungus

Virus

Protozoan

 

 

 

 


Answer any 3 questions from 15 to 18. Each carries 3 scores. (3 x 3 = 9)

15. The amino acid composition of the relevant portion of chain of two haemoglobin molecules (A & B) are shown below.


a. Which one of the polypeptide chain is abnormal?
b. Name the disorder caused by it.
c. What is the reason for this abnormality?
d. What is the effect of this abnormality in such individuals?

16. The diagrammatic representation of the DNA fingerprint from a crime scene and that of a suspected persons are given below:


a. What is your conclusion about the suspects based on DNA Fingerprint given?
b. What is VNTR?
c. Who developed this technique first?

17. (a) Expand STDs.
      (b) Cite any two examples for STD.
      (c) Suggest any two methods for the prevention of STDs.

18. The diagrammatic representation of a process in bacteria is given below:


a. Identify the process.
b. Name the enzyme involved in this process.
c. Explain the three major steps in this process.

👉  ANSWERS

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