In the human body, the 'Cerebrospinal Fluid' (CSF) is a clear, colorless body fluid found in the brain and spinal cord. It is primarily produced by the: MCQ with Answer and Explanation

In the human body, the 'Cerebrospinal Fluid' (CSF) is a clear, colorless body fluid found in the brain and spinal cord. It is primarily produced by the:
A. Dura mater
B. Arachnoid mater
C. Pia mater
D. Choroid plexus in the ventricles
Answer: Option D
Solution (By JKExamLibrary)
Cerebrospinal Fluid (CSF) is a clear, watery fluid that circulates through the ventricles of the brain, the central canal of the spinal cord, and the subarachnoid space. It provides mechanical protection (cushioning), chemical stability, and waste removal for the central nervous system. CSF is primarily produced by the choroid plexus, which is a network of highly vascularized, specialized ependymal cells located within the ventricles of the brain (lateral, third, and fourth ventricles).

Discuss this Question (0)

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

Practice More Biology Questions

Question #1
In the five-kingdom classification, bacteria are placed in the kingdom:
A. Monera
B. Plantae
C. Fungi
D. Protista

Correct Answer: Option A


Explanation:
R.H. Whittaker's five-kingdom classification (1969) categorizes organisms into Monera, Protista, Fungi, Plantae, and Animalia. Monera includes all prokaryotes—bacteria, cyanobacteria, and archaebacteria—characterized by lack of true nucleus and membrane-bound organelles. Protista includes unicellular eukaryotes. Fungi are multicellular saprophytes. Plantae are autotrophic eukaryotes. Monera is the only kingdom of prokaryotes in this system.

This question belongs to: Science Biology
Question #2
The vitamin that is part of coenzyme A and is involved in acyl group transfer is:
A. Thiamine
B. Biotin
C. Riboflavin
D. Pantothenic acid

Correct Answer: Option D


Explanation:
Pantothenic acid (vitamin B₅) is a component of coenzyme A (CoA), essential for the Krebs cycle and fatty acid metabolism. Thiamine is TPP, riboflavin FAD, biotin for carboxylation.

This question belongs to: Science Biology
Question #3
In a typical angiosperm embryo sac, the number of haploid nuclei is:
A. 8
B. 7
C. 4
D. 6

Correct Answer: Option A


Explanation:
A mature embryo sac (female gametophyte) in angiosperms is 7-celled but 8-nucleate: 3 antipodal cells (3 nuclei), 2 synergids (2 nuclei), 1 egg cell (1 nucleus), and 1 central cell with 2 polar nuclei. Thus total 8 haploid nuclei. The central cell is homodiploid (2 polar nuclei). Double fertilization involves these nuclei. This is typical of Polygonum type of development.

This question belongs to: Science Biology