The pigment that absorbs light energy for photosynthesis is mainly located in the:
A. Cytoplasm
B. Cell wall
C. Thylakoid membrane
D. Stroma
Answer: Option C
Solution (By JKSSB Mock Tests)
Chlorophyll and other photosynthetic pigments are embedded in the thylakoid membranes of chloroplasts, where they participate in light-dependent reactions. The stroma contains enzymes for the Calvin cycle. The cell wall and cytoplasm are not sites of photosynthesis.
Explanation:
Abscisic acid (ABA) is a stress hormone that induces stomatal closure by causing efflux of K⁺ ions from guard cells, leading to loss of turgor, thereby reducing water loss during drought. Auxin and cytokinin promote growth, gibberellin stimulates stem elongation and seed germination. ABA also promotes seed dormancy and leaf senescence.
Explanation:
Aspergillosis is an opportunistic fungal infection, often affecting the lungs, caused by inhalation of Aspergillus spores. Candidiasis is by Candida, ringworm by dermatophytes, histoplasmosis by Histoplasma.
Explanation:
Relaxin, produced by the corpus luteum and placenta, softens and relaxes the pelvic ligaments and pubic symphysis to facilitate childbirth. Oxytocin stimulates contractions.
No comments yet. Be the first to start the discussion!