Plant Breeding & Genetics Mcqs - Set 13

1)   Who discovered ribosomes__________________?

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

ANSWER: Palade

Explanation:
No explanation is available for this question!


2)   What is the function of Gorge bodies__________________?

a. Photosynthesis
b. Protein synthesis
c. Segregation of the products of sunthesis
d. RNA synthesis
Answer  Explanation 

ANSWER: Segregation of the products of sunthesis

Explanation:
No explanation is available for this question!


3)   The smallest cell organelle so far is_____________________?

a. Peroxisome
b. Spherosome
c. Ribosome
d. Lysosome
Answer  Explanation 

ANSWER: Ribosome

Explanation:
No explanation is available for this question!


4)   The maximum magnification possible within electron microscope is____________________?

a. 2000 times
b. 4000 times
c. 400,000 times
d. 200,000 times
Answer  Explanation 

ANSWER: 200,000 times

Explanation:
No explanation is available for this question!


5)   The outer most part of plant cell is____________________?

a. Plasma membrane
b. Epidermis
c. Nuclear membrane
d. Cellulose cell wall
Answer  Explanation 

ANSWER: Cellulose cell wall

Explanation:
No explanation is available for this question!


6)   The membrane which surrounds the___________________?

a. Nucleus
b. Chloroplast
c. Vacuole
d. Cutoplasm
Answer  Explanation 

ANSWER: Vacuole

Explanation:
No explanation is available for this question!


7)   In cereals limiting amino acids are________________?

a. Threonine
b. Lysine
c. Methionine
d. a and b
Answer  Explanation 

ANSWER: a and b

Explanation:
No explanation is available for this question!


8)   In maize source of high lysine is___________________?

a. Opaque 2
b. Proline
c. Gang as
d. African tall
Answer  Explanation 

ANSWER: Opaque 2

Explanation:
No explanation is available for this question!


9)   The term useful heterosis was first used by__________________?

a. Meredith and Bridge (1972)
b. Richey (1914)
c. Jenkins (1935)
d. Hull (1950)
Answer  Explanation 

ANSWER: Meredith and Bridge (1972)

Explanation:
No explanation is available for this question!


10)   Top cross was first suggested by__________________?

a. Simmonds (1979)
b. East (1908)
c. Davenport (1908)
d. Davis (1927)
Answer  Explanation 

ANSWER: Davis (1927)

Explanation:
No explanation is available for this question!


11)   Heterosis can be fully exploited in the form of_____________________?

a. Composites
b. Hybrids
c. Multi lines
d. Synthetics
Answer  Explanation 

ANSWER: Hybrids

Explanation:
No explanation is available for this question!


12)   Heterosis can be fixed by___________________?

a. Apomixis
b. Polyploidy
c. Asexual reproduction
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


13)   Out breeding leads to reproduction in____________________?

a. Heterozygosity
b. Homozygosity
c. Population mean
d. None of the above
Answer  Explanation 

ANSWER: Homozygosity

Explanation:
No explanation is available for this question!


14)   Colchicum () is extracted from__________________?

a. Seed
b. Bulb
c. Fruit
d. Flower
Answer  Explanation 

ANSWER: Bulb

Explanation:
No explanation is available for this question!


15)   A nullisomic individual is represented by________________?

a. 2n-1
b. 2n+1
c. 2n-2
d. 2n+2
Answer  Explanation 

ANSWER: 2n-2

Explanation:
No explanation is available for this question!


16)   The change in chromosome number which involves the entire set of genome is known as______________?

a. Anenploidy
b. Euploidy
c. Trisomy
d. all the above
Answer  Explanation 

ANSWER: Euploidy

Explanation:
No explanation is available for this question!


17)   In primary trisomic the extra chromosome is__________________?

a. Isochromosome
b. Traits located chromosome
c. Normal chromosome
d. None of the above
Answer  Explanation 

ANSWER: Normal chromosome

Explanation:
No explanation is available for this question!


18)   Stadler, first used X-rays for induction of mutation in_________________?

a. Oat
b. Maize
c. Wheat
d. Barley
Answer  Explanation 

ANSWER: Barley

Explanation:
No explanation is available for this question!


19)   A mutation which kills 50% of the individual that carry the mutation is known as_________________?

a. Lethal mutation
b. Sub lethal mutation
c. Vital mutation
d. Sub-vital mutation
Answer  Explanation 

ANSWER: Sub lethal mutation

Explanation:
No explanation is available for this question!


20)   In Incern, resistance to spotted aphid is associated with__________________?

a. low sinigen in leaves
b. High saponin in leaves
c. High DIMBOA in leaves
d. High silicant content
Answer  Explanation 

ANSWER: High saponin in leaves

Explanation:
No explanation is available for this question!