Question

8. _____is a photoreceptor that regulates seed germination by absorbing red/far red light A) Cryptochrome B) Phytochrome C) ZEITLUP D) Phototropin

9. _____Which of the following light signals promote germination in lettuce seedlings?

10.____One of the following enzymes is not involved in ammonia assimilation to an amino acid A) Glutamine synthase B) Glutamate synthase C) Glutamate dehydrogenase D) Nitrite reductase

11. _____This plant species fixes carbon at nighttime and caries out Calvin cycle at daytime A) Wheat B) Pineapple C) Sugarcane D) Rice

12. _____One of the following plant responses is not regulated by blue light A. Increased turgor pressure of guard cells B. Stomatal movement under excess light C. Solar tracking by leaves D. Seed germination

13.____One of the following is NOT TRUE about oxidative-pentose phosphate pathway A. It supplies substrates for nucleic acid biosynthesis B. It supplies NADPH to the cytosol for reactions that remove reactive-oxygen species C. It supplies NADPH to the plastids for lipid biosynthesis D. None

14._____A photoreceptor which regulates stomata movement. A) Phototropin B) Phytochrome C) ZEITLUP D) Cryptochrome

15.____Energy conserving step of glycolysis begins with the formation of which of the following compound? A) Glyceraldehyde-3-phosphate B) Phosphoenolpyruvate C) 3-phosphoglycerate D) Pyruvate

Answer 1

8)B) Phytochrome- It absorbs light in red/far red region and regulates seed germination.Phototropin is not as they absorb light in blue region

9)Red light induces germination whereas far red light inhibits seed germination in lettuce.

10)D) Nitrite reductase As ths enzyme is used for the conversion of nitrite into ammonia while the other enzymes are used in amino acid assimilation

11)B) Pineapple because during night time stomata are open and CO2 enters the cell and is fixed whereas during the day time ATP and NADPH is formed which is utilised for the calvin cycle.So calvin cycle is operated during day time.

12)D) Seed germination.All the above phenomenon occur in blue light ie closing and opening of stomata and turgor pressure whereas the seed germination occurs in red light.

13)D)None as the PPP generates intermediates like NADPH which  is used for lipid synthesis and 5 carbon intermediates used for the synthesis of nucleic acid. it is also used for reducing the oxidising stress in the cytosol

14) A)Phototropin regulates stomatal movement.

15)C) Phosphoglycerate- As the conversion from 1,3 bisphosphoglycerate to 3 phosphoglycerate there is synthesis of ATP begins.In the later cycle ATP synthesis occurs during formation of Pyruvate.