Consider statements about human respiration: 1. Hemoglobin has a higher affinity for CO2 than O2. 2. Carbonic anhydrase is present in RBCs. 3. Most CO2 is transported as bicarbonate. Which are correct? MCQ with Answer and Explanation

Explanation:
Inhibin is a peptide hormone that is part of the negative feedback loop regulating the reproductive system. In males, it is secreted by the Sertoli cells of the testes in response to high levels of testosterone and spermatogenesis. In females, it is secreted by the granulosa cells of the ovarian follicles and the corpus luteum. Its primary function is to selectively inhibit the secretion of Follicle Stimulating Hormone (FSH) from the anterior pituitary gland, without affecting LH secretion.

Explanation:
Mitochondria have circular DNA and 70S ribosomes, enabling them to transcribe and translate some proteins independently, hence semi-autonomous. They still depend on nuclear genes for most proteins. The reason correctly explains the assertion.

Explanation:
The Green Revolution (1960s-70s) involved adopting high-yielding varieties (HYVs) of wheat and rice, along with chemical fertilizers, pesticides, and irrigation, leading to dramatic increases in food grain production in India. Norman Borlaug was instrumental. GM crops came later. Organic farming is traditional and low-input.