Monday, 12 November 2018

JKBOSE Class 12th Biology Paper 2018

JKBOSE Class 12th Biology Paper comprises of zoology and botany.

JKBOSE Class 12th Biology Paper 2018
  • Class 12 biology paper 2018 annual.
  • The total number of questions in each paper is 11.
  • Total time for each paper is one and a half hours.
  • The maximum number of marks in each paper is 35.

I. Zoology paper:



(Long Answer Type Questions) 5 marks each

1. What do you mean by Reproductive Health? Write down the significance of Reproductive Health in a society.
Or 
Describe the sequence of events from Zygote till the implantation of the human blastocyst in the Uterus.
2. Explain Founder's effect and Bottleneck effect in brief.

Or 
What is DNA-fingerprinting? Who developed this technique? Add a short note on principle of DNA-fingerprinting.

(Short Answer Type Questions) 3 marks each

3. Draw a well-labeled diagram of the microscopic anatomy of the testis.
4. Explain in brief Down's Syndrome.
5. Write a short note on color blindness in human beings.
6. Write down the causes of Filariasis.

(Very Short Answer Type Questions) 2 marks each 

7. Define the terms Spermatogenesis and Oogenesis.
8. What do you mean by Pathogens and Parasites?
9. What do you mean by &apos 'Gene therapy'?
10. What is Cloning?

(Objective Type) 1 marks each 

11. Do as directed: (Questions/MCQ) 
(i) Expand the term ZIFT and GIFT.

(ii) Who amongst the following proposed the theory of "origin of species" by Natural Selection?
(a) August Weismann

(b) Hugo de-Vries
(c) Charles Darwin
(d) Alfred Wallace

(iii) Alcohol is a "stimulant". (Yes/No)

(iv) Less response of a drug to a specific dose with repeated use is
called ........... (Fill in the blank)

(v) Formation of "Clone" of genetically identical cells derived by division of a single parent cell is called "Gene Cloning".  (True/False)

II. Botany Paper:

JKBOSE Class 12th Biology Paper 2018

(Long Answer Type Questions) 5 marks each 

1. What do you mean by semiconservative mode of replication? Explain the mechanism of the same with suitable diagrams.
Or 
State the principle of independent assortment. Explain the same with dihybrid cross.
2. What is primary productivity?
(i) Why does it vary in different ecosystems?
(ii) State the relationship between gross and primary productivity.

Or 
State the function of a reservoir in a nutrient cycle. Explain the simplified model of "carbon cycle" in nature.

(Short Answer Type Questions) 3 marks each 

3. How does pollen mother cell develop into mature pollen grain? Illustrate the stages with a well-labeled diagram.
4. Define Apomixes. Explain its significance. How can it be commercially used?
5. State the importance of Biofortification.
6. What do you mean by population interaction? Differentiate between:
(i) Mutualism and Competition.
(ii) Parasitism and Predation.

(Very Short Answer Type Questions) 2 marks each

7. What are the harmful effects of ozone depletion in the stratosphere on living organisms? 
8. What is the function of histones in DNA packaging?
9. Retroviruses do not follow central dogma. Comment.
10. What do you mean by another culture? Comment.

(Objective Type Questions) 1 marks each 

11. (i) Define hot spot.

     (ii) Organization responsible for maintaining red data book is:
(a) IUCN (b) WWP
(c) CITES (d) IBWL

(iii) Bt-toxin is:
(a) Intracellular lipid
(b) Intracellular crystalline protein
(c) Extracellular crystalline protein
(d) Glycoprotein

(iv) Which of the following is not biofertilizer:
(a) Nostoc
(b) Mycorrhiza
(c) Agrobacterium
(d) Rhizobium 

(v) In typical embryosoul the nuclei are arranged as:
(a) 3 + 2+ 3
(b) 3 + 3 + 2
(c) 2 + 3 + 3
(d) 2 + 4 + 2

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