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 'Hormone Peptide YY' (PYY) is secreted by the L cells of the distal gastrointestinal tract (ileum and colon) in response to food intake. Its primary function is to:
A. Stimulate gastric acid secretion
B. Inhibit gastric emptying and pancreatic secretion, and reduce appetite (satiety signal)
C. Increase intestinal motility
D. Stimulate appetite

Correct Answer: Option B


Explanation:
Peptide YY (PYY) is a gut hormone secreted by the L cells in the mucosa of the distal small intestine (ileum) and colon, primarily in response to food ingestion, especially fats. Its primary functions are related to the 'ileal brake' mechanism: it inhibits gastric emptying and pancreatic exocrine secretion, slowing down the transit of food through the upper GI tract to allow more time for digestion and absorption in the ileum. It also acts on the hypothalamus to reduce appetite, serving as a satiety signal.

This question belongs to: Science Biology
Question #2
Consider statements about microorganisms: 1. Bacteria are prokaryotic. 2. Fungi have chlorophyll. 3. Viruses can reproduce without a host. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1 only
D. 1, 2 and 3

Correct Answer: Option C


Explanation:
Bacteria are unicellular prokaryotes lacking a true nucleus and membrane-bound organelles. Fungi are heterotrophic eukaryotes that lack chlorophyll and cannot perform photosynthesis. Viruses are obligate intracellular parasites that lack metabolic machinery and absolutely require a living host cell to replicate. Therefore, only statement 1 is correct.

This question belongs to: Science Biology
Question #3
The 'Joint Forest Management' (JFM) concept in India was introduced primarily to:
A. Involve local communities in the management and conservation of degraded forest lands
B. Nationalize all forest lands
C. Ban all human activities in forests
D. Convert forests into commercial plantations

Correct Answer: Option A


Explanation:
Joint Forest Management (JFM) is a concept introduced in India (first in West Bengal in 1988) to address the problem of forest degradation. It involves establishing a partnership between the state forest departments and local communities living near the forests. The communities are given the responsibility to protect and manage the degraded forest lands in exchange for a share in the produce (like non-timber forest products, timber) and employment opportunities, fostering a sense of ownership and sustainable conservation.

This question belongs to: Science Biology