Plant Pathology - Study Mode
[#891] In the process of respiration in plants 180 g of glucose plus 192 g of oxygen produce
Correct Answer
(B) 264 g of CO 2 , 108 g of water and 686 cal. of energy
Explanation
Solution: In the process of respiration in plants 180 g of glucose plus 192 g of oxygen produce 264 g of CO 2 , 108 g of water and 686 cal. of energy. Cellular respiration is the process by which biological fuels are oxidized in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, to drive the bulk production of ATP. C 6 H 12 O 6 (s) + 6O 2 (g) → 6CO 2 (g) + 6H 2 O (l) + heat energy. Glycolysis is the metabolic pathway that converts glucose (C 6 H 12 O 6 ) into pyruvate (CH 3 COCO 2 H). The free energy released in this process is used to form the high-energy molecules adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide (NADH).
[#892] Cofactor required for formation of acetyl CoA is
Correct Answer
(D) All of the above
Explanation
Solution: The cofactor required for the formation of acetyl CoA is ATP, Lipoic acid, and Mg+2, CoA. Acetyl-CoA is a thioester between the acyl group carrier, acetic acid and a thiol, coenzyme A. Coenzyme A (CoA, CoASH or HSCoA) is the key cofactor in the first step of the TCA cycle, responsible for transferring the acetyl group from pyruvate oxidation to oxaloacetate yielding citrate. Acetyl-CoA, as a carrier of acyl groups, is an essential cofactor in the posttranslational acetylation reactions of histone and nonhistone proteins catalyzed by HATs.
[#893] A bacteria which have a large number of flagella all over the cell is categorized in
Correct Answer
(D) Peritrichous
Explanation
Solution: A bacteria which have a large number of flagella all over the cell is categorized as Peritrichous. Bacteria are classified into four groups: monotrichous (having one flagellum), amphitrichous (single flagellum at both ends), lophotrichous (numerous flagella as a tuft), and peritrichous (flagella distributed all over the cell except at the poles). Peritrichous bacteria possess multiple flagella that can grow from essentially any point on the cell body surface.
[#894] Pigment acting as a reaction centre during photosynthesis is
Correct Answer
(C) P 700
Explanation
Solution: Pigment acting as a reaction centre during photosynthesis is P 700 . The process always begins when energy from light is absorbed by proteins called reaction centers that contain green chlorophyll (and other coloured) pigments/chromophores. The excited electrons lost from the reaction center (P 700 ) of photosystem I are replaced by transfer from plastocyanin, whose electrons come from electron transport through photosystem II. P700 absorbance and gas exchange measurements reveal detailed information about e.g. the photosystems, quantum efficiency and the CO 2 assimilation rates.
[#895] Which of these is a complete stem parasite?
Correct Answer
(B) Cuscuta
Explanation
Solution: Cuscuta is a complete stem parasite. Cuscuta commonly known as dodder or amarbel, is a genus of over 201 species of yellow, orange, or red (rarely green) parasitic plants. It is an ectoparasite and is categorized as a holoparasitic plant or a plant that is non-photosynthetic and is completely dependent on a host. The dodder can grow and attach itself to multiple plants. In tropical areas, it can grow more or less continuously and may reach high into the canopy of shrubs and trees.