The iron-containing protein in RBCs that transports oxygen is:
A. Collagen
B. Albumin
C. Hemoglobin
D. Myoglobin
Answer: Option C
Solution (By JKExamLibrary)
Hemoglobin in red blood cells binds oxygen in the lungs and releases it in tissues. Each hemoglobin molecule can bind four O₂ molecules. It also carries some CO₂.
Explanation:
Cuscuta (dodder) is a holoparasite, lacking chlorophyll, and derives nutrients from the host plant via haustoria. Therefore, A is true but R is false.
Explanation:
Iodine is essential for the synthesis of thyroid hormones T₃ and T₄. Deficiency causes hypothyroidism and goiter (enlarged thyroid gland). Iodized salt is a preventive measure.
Explanation:
Phagocytosis, or 'cell eating', is a type of endocytosis where the cell membrane engulfs large solid particles, such as bacteria or cellular debris, forming a vesicle called a phagosome. This phagosome then fuses with a lysosome for digestion. It is primarily performed by specialized cells like macrophages and neutrophils.
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