
Which statement about Krebs cycle is correct?
i. The waste product of the Krebs cycle is oxygen
ii. Complete oxidation of food takes place. Krebs cycle involves step by step breakdown of pyruvic acid/lactic acid to produce ATP and .
iii. Electron carriers are produced by the Krebs cycle for the transportation of electron chains.
iv. None of the above
Answer
388.5k+ views
Hint: The citric acid cycle, commonly known as the Krebs cycle, is the second main stage in oxidative phosphorylation. Following glycolysis, the Krebs cycle transfers energy from these molecules to electron carriers, which are then utilised in the electron transport chain to generate the cell's energy currency. Site of Krebs cycle is the mitochondria of eukaryotes and the cytosol of prokaryotes.
Complete answer:
Let us solve this question by analyzing each and every option.
Option: i. Krebs cycle does not produce oxygen as a waste product instead it utilizes oxygen in its various reactions.
So, Option: i. is not correct.
Option: ii. In Krebs cycle complete oxidation of food occurs by a step by step sequential breakdown of pyruvic acid formed as a result of glycolysis. It yields NADH, FADH and GTP which are then converted to ATP in the electron transport chain. It also releases in this process.
So, Option: ii. is correct.
Option: iii. Electron carriers are not produced in the Krebs cycle.
So, Option: iii. is not correct.
Option: iv. None of the above
So, Option: iv. is also not correct.
Note:
The tricarboxylic acid (TCA) cycle, commonly known as the Krebs or citric acid cycle, is the primary source of energy for cells and is an essential component of aerobic respiration. The cycle converts the available chemical energy of acetyl coenzyme A (acetyl CoA) into nicotinamide adenine dinucleotide reducing power (NADH). It is a characteristic of aerobic organisms.
Complete answer:
Let us solve this question by analyzing each and every option.
Option: i. Krebs cycle does not produce oxygen as a waste product instead it utilizes oxygen in its various reactions.
So, Option: i. is not correct.
Option: ii. In Krebs cycle complete oxidation of food occurs by a step by step sequential breakdown of pyruvic acid formed as a result of glycolysis. It yields NADH, FADH and GTP which are then converted to ATP in the electron transport chain. It also releases in this process.
So, Option: ii. is correct.
Option: iii. Electron carriers are not produced in the Krebs cycle.
So, Option: iii. is not correct.
Option: iv. None of the above
So, Option: iv. is also not correct.

Note:
The tricarboxylic acid (TCA) cycle, commonly known as the Krebs or citric acid cycle, is the primary source of energy for cells and is an essential component of aerobic respiration. The cycle converts the available chemical energy of acetyl coenzyme A (acetyl CoA) into nicotinamide adenine dinucleotide reducing power (NADH). It is a characteristic of aerobic organisms.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Write the following in Roman numerals 25819 class 7 maths CBSE

Trending doubts
State and prove Bernoullis theorem class 11 physics CBSE

What are Quantum numbers Explain the quantum number class 11 chemistry CBSE

Write the differences between monocot plants and dicot class 11 biology CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

State the laws of reflection of light

In northern hemisphere 21st March is called as A Vernal class 11 social science CBSE
