The enzyme that converts fibrinogen to fibrin during blood clotting is: MCQ with Answer and Explanation

Explanation:
Relaxin is a peptide hormone produced by the corpus luteum and the placenta during pregnancy. Its primary roles are to relax the smooth muscles of the uterus (inhibiting contractions to maintain pregnancy) and to soften and increase the flexibility of the connective tissues in the pelvis, specifically the pelvic ligaments and the pubic symphysis. This relaxation and widening of the pelvic joints facilitate the passage of the baby through the birth canal during delivery.

Explanation:
The Krebs cycle (citric acid cycle) occurs in the mitochondrial matrix in eukaryotes. It oxidizes acetyl-CoA to CO₂, producing NADH, FADH₂, and GTP. The inner membrane houses the electron transport chain. Glycolysis occurs in cytoplasm, the Calvin cycle in chloroplast stroma. The matrix contains the necessary soluble enzymes.

Explanation:
The carpel is the female reproductive organ of a flower, consisting of the ovary, style, and stigma; the stigma is the terminal, sticky receptive surface where pollen grains land and germinate. The stamen is the male reproductive organ, consisting of the filament and the anther; the anther is the terminal sac where pollen grains (male gametophytes) are produced. After fertilization, the ovule develops into the seed, while the ovary wall matures and develops into the fruit. Thus, statements 1 and 2 are correct.