NEET TEST SERIES 116 BIOLOGY

1. Which organelle is surrounded by a double phospholipid bilayer with many large pores?

(a) Nucleus
(b) Plasma membrane
(c) Golgi apparatus
(d) Mitochondrion

2. Coconut milk (coconut waler) is widely used in tissue culture because it contains

(a) auxins
(b) ethylene
(c) cytokinin
(d) gibberellins

3. The Okazaki fragments in ON A chain growth

(a) polymerize in the 3’ – to – 5’ direction and forms replication fork
(b) proves semi-conservative nature of ON A replication
(c) polymerize in the 5′ – to – 3* direction and explain 3′ – to – 5′ DNA replication
(d) result in transcription

4. Which bacteria is utilized in gober gas plant?

(a) Methanogens
(b) Nitrifying bacteria
(c) Ammonifying bacteria
(d) Denitrifying bacteria

5. The logistic population growth is expressed by the equation:

6. The reactions of Calvin cycle not directly dependent on light, but they usually do not occur at night. Why?

(a) Night is often too cold for these reactions to occur.
(b) CO₂ concentration in night is too high for these reactions to occur.
(c) Plants usually open their stomata at night.
(d) Calvin cycle is dependent on the products of light reaction.

7. In down’s syndrome of a male chi Id, the sex complement is

(a) XO
(b) 45 XY
(c) 45 XX
(d) XXY

8. Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to

(a) repulsion
(b) recombination
(c) linkage
(d) crossing over

9. Pick out the correct statements
(i) Haemophilia is a sex-linked recessive disease
(ii) Down’s syndrome is due to aneuploidy
(iii) Phenylketonuria is an autosomal recessive gene disorder
(iv) Sickle cell anaemia is a X-linked recessive gene disorder

(a) (i) and (iv) are correct
(b) (iii) and (iv) are correct
(c) (i),(iii) and (lv) are correct
(d) (i). (ii) and (iii) are correct

10. The first step of photosynthesis is

(a) excitation of electron of chlorophyll by a photon of light
(b) formation of ATP
(c) attachment of CO₂ to 5 carbon sugar
(d) ionisation of water

11. Which of these statements is incorrect?

(a) Enzymes of TCA cycle are present in mitochondrial matrix
(b) Glycolysis occurs in cytosol
(c) Oxidative phosphorylation takes place in outer mitochondrial membrane
(d) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms

12. “Foolish seedling” disease of rice led to the discovery of

(a) ABA
(b) 2,4-D
(c) 1AA
(d) GA

13. Which one of the following grow th regulators is known as ‘stress hormone’?

(a) Abscissic acid
(b) Ethylene
(c) GA₃
(d) Indole acetic acid

14. Diadelphous stamens are found in

(a) China rose and citrus
(b) China rose
(c) Citrus 
(d) Pea

15. Statement I: Biooontrol refers to the useofbiokigical methods for controlling plant diseases and pests.
     Statement II: Use of biocontrol measures with greatly reduced our dependence on toxic chemical and pesticide. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

16. Statement I: Frame-shift mutation arise due to change in single base pair of DNA.
        Statement II: Point-mutation is due to insertion and deletion of base pair.

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

17. Which parental phenotypes would produce offspring with blood group phenotypes in the expected ratio of 1 type A : 1 type B?

18. The given figures (A and B) show the modification of roots. Which of the following statements regarding the figures is correct?

(a) Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.
(b) Pneumatophores conducts water, minerals & photosynthesis
(c) Pneumatophore is found in the plants that grow’ in sandy soil.
(d) Turnip & carrot shows adventitious roots and sweet potato shows tap root.

19. Match column-1 with column-ll and select the correct answer using the codes given below:

20. Which of the following statements of incorrect?

(a) Oxidation-reducat ion reactions produce proton gradi ent in respiration
(b) During aerobic respiration, role of oxygen is limited to the terminal stage
(c) In ETC (Electron Transport Chain), one molecule of N ADH + FT gives rise to 2 ATP molecules, and one FADH₂ gives rise to 3 ATP molecules
(d) ATP is synthesized through complex V