The bone that protects the brain is the: MCQ with Answer and Explanation

The bone that protects the brain is the:
A. Cranium
B. Sternum
C. Vertebra
D. Pelvis
Answer: Option A
Solution (By JKSSB Mock Tests)
The cranium (skull) is composed of several bones fused together, encasing and protecting the brain. Vertebrae protect the spinal cord, sternum protects the heart and lungs anteriorly, pelvis supports abdominal organs and connects to legs. The cranium also provides attachment for muscles.

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Practice More Biology Questions

Question #1
The element that is a constituent of the amino acids methionine and cysteine is:
A. Sulfur
B. Iron
C. Phosphorus
D. Nitrogen

Correct Answer: Option A


Explanation:
Sulfur is present in the amino acids methionine and cysteine (which forms disulfide bonds in proteins). Nitrogen is in all amino acids, phosphorus in nucleic acids and ATP, iron in heme. Sulfur is also in vitamins biotin and thiamine. Disulfide bonds are crucial for protein tertiary structure.

This question belongs to: Science Biology
Question #2
The organism that causes the disease 'anthrax' is:
A. Bacillus anthracis
B. Streptococcus pyogenes
C. Vibrio cholerae
D. Salmonella typhi

Correct Answer: Option A


Explanation:
Anthrax is a zoonotic disease caused by the spore-forming bacterium Bacillus anthracis. It can infect skin, lungs, and gastrointestinal tract. Streptococcus pyogenes causes strep throat, Salmonella typhi typhoid, Vibrio cholerae cholera. Anthrax spores can survive for decades in soil and have been used as a bioweapon.

This question belongs to: Science Biology
Question #3
The cell wall of fungi is primarily composed of:
A. Cellulose
B. Silica
C. Chitin
D. Peptidoglycan

Correct Answer: Option C


Explanation:
The cell wall of fungi is primarily composed of chitin, a tough, complex polysaccharide also known as fungal cellulose. This distinguishes them from plants, whose cell walls are made of cellulose, and bacteria, whose cell walls contain peptidoglycan. Chitin provides structural support and protection to fungal cells.

This question belongs to: Science Biology