Which type of immunity is achieved by vaccination? MCQ with Answer and Explanation

Question
Which type of immunity is achieved by vaccination?
A. Natural passive immunity
B. Artificial passive immunity
C. Artificial active immunity
D. Natural active immunity
Answer: Option C
Solution (By JKSSB Mock Tests)
Vaccination introduces antigens (weakened or killed pathogens) to stimulate the body's own immune system to produce antibodies and memory cells without causing disease. This is artificial active immunity. Natural active immunity is acquired by recovering from infection. Artificial passive immunity is direct administration of antibodies (e.g., antiserum). Natural passive immunity is transfer of maternal antibodies to fetus.
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Question #1
Which of the following vitamins is essential for blood clotting?
A. Vitamin K
B. Vitamin A
C. Vitamin E
D. Vitamin C
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Correct Answer: Option A

Explanation:
Vitamin K is a fat-soluble vitamin required for the synthesis of clotting factors II (prothrombin), VII, IX, and X in the liver. Deficiency leads to prolonged clotting time and bleeding disorders. Vitamin A is for vision, C for collagen synthesis and antioxidant, E for antioxidant. Vitamin K is found in green leafy vegetables and synthesized by gut bacteria.
This question belongs to: Science Biology
Question #2
Consider statements about microorganisms: 1. Algae are photosynthetic. 2. Protozoa are multicellular. 3. Fungi reproduce by spores. Which are correct?
A. 1 and 3 only
B. 1 and 2 only
C. 2 and 3 only
D. 1, 2 and 3
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Correct Answer: Option A

Explanation:
Algae are a diverse group of photosynthetic, eukaryotic organisms ranging from unicellular to multicellular forms. Protozoa are unicellular, heterotrophic eukaryotic organisms, not multicellular. Fungi typically reproduce asexually and sexually through the formation of spores, which are dispersed to form new individuals. Thus, statements 1 and 3 are correct.
This question belongs to: Science Biology
Question #3
The type of reproduction that involves only one parent and no gamete fusion is:
A. Sexual reproduction
B. Asexual reproduction
C. Fertilization
D. Cross-pollination
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Correct Answer: Option B

Explanation:
Asexual reproduction (binary fission, budding, fragmentation, vegetative propagation) produces genetically identical offspring from a single parent. Sexual reproduction involves gamete fusion. Fertilization is gamete union.
This question belongs to: Science Biology
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