During glycolysis, glucose is converted into: MCQ with Answer and Explanation

During glycolysis, glucose is converted into:
A. Ethanol
B. Citric acid
C. Acetyl CoA
D. Pyruvate
Answer: Option D
Solution (By JKSSB Mock Tests)
Glycolysis, occurring in the cytoplasm, breaks down one molecule of glucose (6C) into two molecules of pyruvate (3C), producing a net gain of 2 ATP and 2 NADH. This is the first step of both aerobic and anaerobic respiration. Pyruvate then enters the mitochondria for further oxidation in the Krebs cycle if oxygen is available.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The disease caused by the Zika virus is transmitted by:
A. Culex mosquito
B. Tsetse fly
C. Anopheles mosquito
D. Aedes mosquito

Correct Answer: Option D


Explanation:
Zika virus is primarily transmitted by Aedes aegypti and Aedes albopictus mosquitoes. It can cause microcephaly in fetuses. Anopheles transmits malaria, Culex filariasis/West Nile.

This question belongs to: Science Biology
Question #2
Assertion (A): Humans are ureotelic.
Reason (R): The liver converts ammonia to urea, which is excreted in urine.
A. Both A and R are true, and R is the correct explanation.
B. A false, R true.
C. Both A and R are true, but R is not the correct explanation.
D. A true, R false.

Correct Answer: Option A


Explanation:
Ammonia, toxic, is converted to less toxic urea in the liver via the urea cycle, then excreted by kidneys. Thus, humans excrete urea (ureotelic). R explains A.

This question belongs to: Science Biology
Question #3
Assertion (A): Human blood is a connective tissue. Reason (R): Blood cells are embedded in a liquid extracellular matrix called plasma.
A. Both A and R are true, and R is the correct explanation.
B. A false, R true.
C. A true, R false.
D. Both A and R are true, but R is not the correct explanation.

Correct Answer: Option A


Explanation:
Blood is classified as a specialized connective tissue because it has cells (RBCs, WBCs, platelets) suspended in a fluid matrix (plasma) and connects different body parts by transporting substances. Connective tissues have cells separated by extracellular matrix. Thus, the reason correctly justifies the assertion. Bone, cartilage, lymph are other connective tissues.

This question belongs to: Science Biology