Plant Breeding & Genetics Mcqs - Set 20

1)   Chemically DNA differs from RNA by __________________?

a. Thymine present in DNA and Uralic in RNA
b. Deoxyribose and thymine is present in DNA and ribose and Ural in RNA
c. Ribose and thymine in DNA and deoxyribose and uracil in RNA
d. Deoxyribose in DNA and ribose in RNA
Answer  Explanation 

ANSWER: Deoxyribose and thymine is present in DNA and ribose and Ural in RNA

Explanation:
No explanation is available for this question!


2)   Electron microscope was invented by _________________?

a. Knoll and Risks
b. Schwaan
c. Sigmund
d. Robert Hook
Answer  Explanation 

ANSWER: Knoll and Risks

Explanation:
No explanation is available for this question!


3)   Ribosomes are important because they help in __________________?

a. Movement
b. Respiration
c. Protein synthesis
d. Growl
Answer  Explanation 

ANSWER: Protein synthesis

Explanation:
No explanation is available for this question!


4)   Who discovered mitochondria__________________?

a. Palade
b. Altmann
c. Cowdry
d. Garner
Answer  Explanation 

ANSWER: Altmann

Explanation:
No explanation is available for this question!


5)   Plastids bring about___________________?

a. Secretion
b. Respiration
c. Excretion
d. Conversion of light energy into chemical energy
Answer  Explanation 

ANSWER: Conversion of light energy into chemical energy

Explanation:
No explanation is available for this question!


6)   Which part of cell is important for and synthesis protoplasm ______________________?

a. Mitochondria
b. Nucleus
c. Chloroplast
d. Chromosomes
Answer  Explanation 

ANSWER: Nucleus

Explanation:
No explanation is available for this question!


7)   Carbohydrates synthesis is carried out by ___________________?

a. Ribosomes
b. Golgi bodies
c. Mitochondria
d. Plastid
Answer  Explanation 

ANSWER: Plastid

Explanation:
No explanation is available for this question!


8)   Which of the cell organelle is considered to be rich in catabolic enzymes_____________________?

a. Golgi bodies
b. Mitochondria
c. Lysosome
d. Endoplasmic reticulum
Answer  Explanation 

ANSWER: Mitochondria

Explanation:
No explanation is available for this question!


9)   The diameter of mitochondria is __________________?

a. 2-4 micron
b. 1-4 micron
c. 0.5-2 micron
d. 40-70 micron
Answer  Explanation 

ANSWER: 0.5-2 micron

Explanation:
No explanation is available for this question!


10)   The cellular structure which always disappears during mitosis is___________________?

a. Plastids
b. Protoplasm
c. Membrane
d. Nuclear and membrane
Answer  Explanation 

ANSWER: Nuclear and membrane

Explanation:
No explanation is available for this question!


11)   Which statement is true___________________?

a. Etiolation is not a reversible process
b. Etiolation is genetically while albinism is physiological
c. Etiolation is physiological while albinism is genitival
d. Etiolation and albinism are synonyms
Answer  Explanation 

ANSWER: Etiolation is physiological while albinism is genitival

Explanation:
No explanation is available for this question!