40) Which electron carriers) function in the citric acid cycle? A) NAD+ only B)

Question

40) Which electron carriers) function in the citric acid cycle? A) NAD+ only B) NADH and FADH2 C) the electron transport chain D) ADP and ATP 41) Where in a plant cell A) stroma of the chloroplast B) thylakoid membrande C) interior of the thylakoid (thylakoid space) D) outer membrane of the chloroplast 42) An organism is discov consumption of sugar increases does not gain much weight. This organism A) is anormaleukaryotic organism ered that thrives in both the presence and absence of oxygen in the air, Curiously, the is oxygen is removed from the organism's environment, even though the organism B) is photosynthetic - C) is an anaerobic organism D) is a facultative anaerobe afthe first metabolic pathways to have evolved? is present in most

Explanation / Answer

Answer

40)

B) NADH and FADH2

Explanation :

The citric acid cycle is also called the Krebs cycle. In this part of cellular respiration, pyruvate is oxidized to form carbon dioxide. The cycle culminates in the formation of 2 ATP, 6 NADH and 2 FADH2 for two turns of the cycle.

There are 8 steps in the citric acid cycle. Following this cycle, the electron transport chain occurs which powers the synthesis of ATP. NADH and FADH2 are the electron carriers which contain most of the energy extracted from the original energy source which was the glucose

41)

A) stroma of chloroplast

Explanation : A subtance present in stroma Of chloroplast (RUBP) accepts CO2 and form first stable

Product of Calvin cycle.

42)

D) facultative anaerobes

Explanation : they can grow in presence of oxygen but they have more affinity to anaerobic environment

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