Consider the following statements about the greenhouse effect: 1. Greenhouse gases trap heat in the atmosphere. 2. CO₂, methane, and water vapor are greenhouse gases. 3. The greenhouse effect is solely harmful. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about the greenhouse effect:
1. Greenhouse gases trap heat in the atmosphere.
2. CO₂, methane, and water vapor are greenhouse gases.
3. The greenhouse effect is solely harmful.
Which of the above is/are correct?
A. 1 and 2 only
B. 1, 2, and 3
C. 2 and 3 only
D. 1 and 3 only
Answer: Option A
Solution (By JKSSB Mock Tests)
The natural greenhouse effect keeps Earth warm enough for life; its enhancement causes global warming. Statement 3 is incorrect. 1 and 2 are correct.
Explanation:
Neurotensin is a 13-amino acid peptide that functions as both a neuromodulator in the central nervous system and a hormone in the gastrointestinal tract. In the gut, it is secreted by the N cells in the ileum in response to fat ingestion. Its primary gastrointestinal functions are to inhibit gastric motility and gastric acid secretion (contributing to the 'ileal brake'), and to stimulate the release of histamine from mast cells and glucagon from the pancreas. It also causes vasodilation in the intestinal mucosa.
Explanation:
Acetylcholinesterase degrades acetylcholine into acetate and choline, terminating the synaptic signal. Choline acetyltransferase synthesizes ACh, MAO and COMT degrade monoamines.
Explanation:
Ovulation is the process in the female menstrual cycle where a mature ovarian follicle ruptures and discharges an ovum (secondary oocyte) into the fallopian tube, where it can potentially be fertilized. It typically occurs around the 14th day of a 28-day cycle, triggered by a surge in Luteinizing Hormone (LH).
No comments yet. Be the first to start the discussion!