Consider statements about biotechnology: 1. Genetic engineering involves altering an organism's DNA. 2. Cloning creates an exact genetic copy. 3. Tissue culture is used for plant propagation. Which are correct? MCQ with Answer and Explanation

Consider statements about biotechnology: 1. Genetic engineering involves altering an organism's DNA. 2. Cloning creates an exact genetic copy. 3. Tissue culture is used for plant propagation. Which are correct?
A. 1, 2 and 3
B. 1 and 3 only
C. 2 and 3 only
D. 1 and 2 only
Answer: Option A
Solution (By JKExamLibrary)
Genetic engineering (recombinant DNA technology) involves the direct manipulation of an organism's genes using biotechnology to alter its characteristics. Cloning is the process of producing genetically identical copies of a biological entity, such as a gene, cell, or entire organism. Tissue culture (micropropagation) is a technique used to grow plant cells, tissues, or organs in a sterile nutrient medium, allowing for the rapid, large-scale propagation of plants from a small explant. All statements are correct.

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The corpus luteum secretes which hormone that maintains pregnancy in early stages?
A. Estrogen
B. Progesterone
C. Luteinizing hormone
D. Human chorionic gonadotropin (hCG)

Correct Answer: Option B


Explanation:
The corpus luteum, formed from the ruptured follicle after ovulation, secretes progesterone (and some estrogen) which prepares the endometrium for implantation and maintains early pregnancy until the placenta takes over (around 8-10 weeks). hCG, produced by the placenta, maintains the corpus luteum. Progesterone is crucial for maintaining the uterine lining.

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Question #2
The disease caused by deficiency of vitamin C is:
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B. Pellagra
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Correct Answer: Option C


Explanation:
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Question #3
What does Taxonomy primarily deal with?
A. Classification of organisms
B. Study of fossils
C. Study of tissues
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Correct Answer: Option A


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Taxonomy is the branch of science concerned with the classification, identification, and naming of organisms. It involves arranging organisms into hierarchical categories based on their shared characteristics and evolutionary relationships. The study of tissues is Histology, and the study of fossils is Paleontology.

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