Consider statements about biotechnology: 1. Bt cotton is resistant to insects. 2. Golden rice is enriched with Vitamin A. 3. Cloning produces genetically diverse offspring. Which are correct? MCQ with Answer and Explanation
Consider statements about biotechnology: 1. Bt cotton is resistant to insects. 2. Golden rice is enriched with Vitamin A. 3. Cloning produces genetically diverse offspring. Which are correct?
A. 2 and 3 only
B. 1 and 3 only
C. 1 and 2 only
D. 1, 2 and 3
Answer: Option C
Solution (By JKExamLibrary)
Bt cotton is transgenic, containing genes from Bacillus thuringiensis that produce proteins toxic to specific insect pests like the bollworm. Golden rice is genetically modified to produce beta-carotene, a precursor of Vitamin A, to combat deficiency. Cloning involves creating an exact genetic copy of an organism, resulting in genetically identical offspring, not diverse ones. Thus, statements 1 and 2 are correct.
Explanation:
Iron-deficiency anemia is the most prevalent nutritional deficiency worldwide, characterized by fatigue, pallor, and reduced oxygen-carrying capacity. It is treated with iron supplementation and dietary changes.
Explanation:
A synapse is the junction between two neurons (or neuron and effector) where the nerve impulse is transmitted from the presynaptic neuron to the postsynaptic neuron, usually via neurotransmitters. Axon carries impulses away from the cell body, dendrites receive signals, soma is the cell body. Synaptic transmission can be chemical or electrical.
Explanation:
Salivary amylase (ptyalin) initiates starch digestion in the mouth, hydrolyzing it into maltose and dextrins. Pepsin digests protein, lipase fats, rennin curdles milk. Amylase works optimally at neutral pH.
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