Biology Most expected Questions series-1 

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1. DNA is not present in :-

(1) Ribosomes 

(2) Nucleus

(3) Mitochondria 

(4) Chloroplast

2. Which structures perform the function of mitochondria in bacteria ?

(1) Nucleoid 

(2) Lysosome

(3) Ribosome 

(4) Mesosome

3. Mitochondria and mitosis are absent in :-

(1) Yeast

(2) Chlamydomonas

(3) Anabena

(4) Fungi

4. Which chemical property is shared by all types of lipids forming the plasma membrane ?

(1) Sugar component

(2) Glycerol backbone

(3) Phosphate group

(4) Amphipathic nature

4. Which cell organelle synthesize steroidal hormones ?

(1) RER 

(2) SER

(3) Golgi complex 

(4) Lysosome

5. Which one is not a functionof Golgi Apparatus ?

(1) Site of synthesis of glycolipids

(2) Secretion

(3) Site of glycoprotein synthesis

(4) Site of protein synthesis

6. Lysosomes are ______ vesicular structures formed by the process of packaging in the

_____:-

(1) Membrane bound, Golgi apparatus

(2) non-membrane bound, Golgi-apparatus

(3) Membrane bound, ER

(4) non-membrane bound, ER

7. The microtubules arrangement of eukaryotic flagella is represented as :-

(1) 10 + 2

(2) 9 + 0

(3) 9 + 2

(4) 10 + 1 + 3

8. Organelle important for giving rise to spindle apparatus during cell division in animal cell :-

(1) Centriole

(2) Cell membrane

(3) Mitochondria

(4) Chloroplast

9. Arrangement of microtubule in centriole is :-

(1) 9+1 

(2) 9+2

(3) 9+0 

(4) 8+1

10. Pigment containing organelles found in plant cell only are :

(1) Chromatophores

(2) Plastids

(3) Chlorophyll

(4) Cell wall

11. Pore complex is present on :-

(1) Membrane of golgibody

(2) Membrane of nucleus

(3) Membrane of cell

(4) Cell wall

12. E.G. Balbiani discovered a special chromosome in

(1) Oocytes

(2) Salivary gland cell

(3) RBCs

(4) Chloroplast

13. Mark the correct statement :-

(1) Histone proteins are rich in acidic amino acids

(2) 55-S ribosomes are found in mammalian mitochondria

(3) RER is involved in detoxification of drugs

(4) 20 microtubules are present in the periphery of centriole

14. In 'S' phase of the cell cycle :-

(1) Amount of DNA doubles in each cell.

(2) Amount of DNA remains same in each cell.

(3) Chromosome number is increased.

(4) Amount of DNA is reduced to half in each cell.

15. In TCA cycle, conversion of succinyl CoA to succinic acid needs :-

(1) GDP + iP

(2) CoA + GTP + iP

(3) Acetyl CoA + GDP + iP

(4) Acetyl CoA + GTP + iP

16. In bacterial cell from aerobic respiration of 1 glucose how many ATP will form ?

(1) Only 36

(2) Only 38

(3) Only 2

(4) Both 36 & 38 are possible

17. How many statements are incorrect w.r.t. fermentation?

(A) 7% concentration of alcohol is poisonous for yeast cells

(B) 13% energy trapped in ATP by partial breakdown of glucose.

(C) NADH(H) oxidised vigorously.

(D) Very common in higher organisms.

(1) 3 

(2) 4 

(3) 2 

(4) 1

18. In amphibolic pathway, glycerol would enter the pathway after being converted to :-

(1) Acetyl Co-A 

(2) Pyruvic acid

(3) Glucose 

(4) PGAL

19. If volume of CO liberated during respiration is more than the volume of O used, the respiratory substrate will be :-

(1) carbohydrate 

(2) fat

(3) protein 

(4) organic acid

20. Carbon refixation in C4 plants occurs in chloroplasts of :

(1) Palisade tissue

(2) Spongy mesophyll

(3) Bundle sheath cells

(4) Guard cells

21. Which organelle out of these does not participate in photorespiration?

(1) Peroxisomes 

(2) Mitochondria

(3) Chloroplasts 

(4) Golgi bodies

22. At higher light intensities gradually rate of photo synthesis:-

(1) Further increases

(2) Further decreases

(3) does not show further increase

(4) first decreases then increases

23. What is true for CAM plants

(a) Adapted to cold climate

(b) Stomata are scotoactive

(c) Showing kranz type of leaf anatomy

(d) Phylogenetically advanced than C4 plants

(1) Only a 

(2) Only b

(3) Only a & c 

(4) Only b & d

24. Of the total incident solar radiation, what is the proportion of PAR ?

(1) About 90%

(2) About 80 %

(3) More than 95%

(4) Less than 50%

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