You set up an experiment in which you breed two populations of true-breeding pea plants. The first true-breeding population has yellow round seeds and the second has green wrinkled seeds. All of the F1 plants yield yellow round seeds. When you self -fertilize the F1 the F2 generation yields a mixture of yellow round, yellow wrinkled, green round and green wrinkled seeds. What does this tell you about the alleles for seed color and shape?

#Question id: 11726

#Unit 6. System Physiology – Plant

SPY acts upstream of GAI and RGA in the Gibberellin signal transduction chain, what is the role of SPY?

#Question id: 11727

#Unit 6. System Physiology – Plant

The stages of gibberellin biosynthesis takes place various organelles and completed in various forms such as;

a) In the endoplasmic  reticulum GA12 is converted to GA53 by hydroxylation at C-13

b) In the cytosol GA12 is converted via 13-hydroxylation pathway into GA9 and further converted into GA4 by 3-β-Hydroxylation

c) In the cytosol GA53 is converted via 13-Hydroxylation pathway into GA20 and further converted into GA1 by 3-β-Hydroxylation

d) Hydroxylation at C-2 then converts GA4 and GA1 to the inactive forms GA34 and GA8, respectively

Which one of the following given combination from the above statements is true?

#Question id: 11728

#Unit 6. System Physiology – Plant

Which of the following is the precursor of  Cytokinin?

#Question id: 11729

#Unit 6. System Physiology – Plant

Given some properties of cytokinin;

a) Kinetin is a naturally occurring plant growth regulator

b) it does occur as a base in the DNA of any species

c) It is a by-product of the heat-induced degradation of DNA

d) the deoxyribose sugar of adenosine is converted to a furfuryl ring and shifted from the 9 position to the 6 position on the adenine ring

which of the following given statements incorrect?

#Question id: 11730

#Unit 6. System Physiology – Plant

Following are some statements regarding plant hormones.

a) Auxin and Cytokinin promote cell division

b) Auxin and Ethylene can cause similar plant responses, such as induction of flowering in pineapple and inhibition of stem elongation

c) cytokinin and ethylene signal transduction pathways are derived from the bacterial two-component regulatory system mainly multistep version

d) Gibberellins Are Synthesized via the terpenoid Pathway

e) GA promotes seed dormancy while ABA causes seed germination

Which of the following from the given above combination is incorrect?

#Question id: 11731

#Unit 6. System Physiology – Plant

Following are some statements regarding the Cytokinin, which of the following is incorrect?