The nitrogenase enzyme complex fixes N2 produces ammonia, The nitrogenase enzyme complex catalyzes this reaction by following characteristics given below;

a) It can be separated into two components—the Fe protein and the MoFe protein— neither of which has catalytic activity by itself

b) Fe protein is the smaller of the two components and has two identical subunits, each contains an iron–sulfur cluster, which participates in the redox reactions

c) The Fe protein is irreversibly inactivated by O2 while MoFe protein is activated by O2

d) MoFe protein has four subunits, each subunit has two Mo–Fe–S clusters

e) Ferredoxin serves as an electron donor to the Fe protein, and Fe protein reduces the MoFe protein without any hydrolysing ATP

f) Only prokaryotes have nitrogenase enzyme

Which of the following characteristics of nitrogenase enzyme complex is incorrect?

#Question id: 5467

#Unit 8. Inheritance Biology

Two varieties of maize averaging 25 and 125 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 75 inches in height. Of the 500 F2 plants, the Shortest 2 is 25 inches and the tallest 2 are 125 inches. What will be number phenotype observe in F2 progeny and number of polygene contribute for that character respectively?

#Question id: 5466

#Unit 8. Inheritance Biology

Researcher studies of discontinuous and continuous character, the following conclusion were made

a. Discontinuous characteristics exhibit few distinct phenotypes

b- Continuous characteristics exhibit a wide range of phenotypes

c .Continuous characteristics are frequently produced by effects of many genes

d. Continuous characteristics are frequently produced by effects of environment

Which of above conclusion is correct?

#Question id: 5465

#Unit 8. Inheritance Biology

A pure line apple plant yielding 3.5 pound apple was crossed with a .5 pound apple yielding plant, all F1 progenies yielded apples of 2 pound, F1 plant allowed to self fertilization then what will be proportional of 3 pound, 2 pound and .5 pound respectively among offspring if character is governed by 3 pair of polygene

#Question id: 5464

#Unit 8. Inheritance Biology

Two varieties of maize averaging AABBCC (200 inch) and aabbcc (80 inch) in height, respectively, are crossed. The F1 progeny is quite uniform averaging 140 inches in height allowed to self fertilization. If height is control by 3 pair of polygene, what is the height of following genotype of F2 plant?

I- AaBBCC     II- aaBbCC       III- aabbCc

#Question id: 5463

#Unit 8. Inheritance Biology

Plants with genotype aabb have seeds that average 1 g in weight, whereas plants with genotype AABB have seeds that average 3.4 g in weight. Plant with genotype aabb is crossed with plant of genotype AABB. If the F1 plants are intercrossed to produced 2/8 proportional of F2 plant having expected seed weight

A  . 1.6        B- 2.8        C-  2.2       D. 1             E . 3.4  

#Question id: 5462

#Unit 8. Inheritance Biology

What was the ratio of F2 generation when red and white kernelled variety of wheat were crossed when 2 QTL control character?