Glucose is primarily reabsorbed in which part of the nephron? MCQ with Answer and Explanation

Explanation:
In 1952, Alfred Hershey and Martha Chase conducted the famous blender experiment to confirm that DNA is the genetic material of the T2 bacteriophage. They used radioactive sulfur (35S) to label the protein coat (capsid) of the phage, as sulfur is present in amino acids (methionine, cysteine) but not in DNA. They used radioactive phosphorus (32P) to label the DNA, as phosphorus is in the DNA backbone but not in proteins. After infection and blending, they found that only 32P (DNA) entered the bacterial cell to produce new phages, proving DNA is the genetic material.

Explanation:
Adventitious roots arise from non-root tissues like stems, leaves, or branches. Examples: prop roots of banyan, stilt roots of maize, aerial roots of orchids. Taproot and fibrous roots develop from the radicle.

Explanation:
Calcitonin is a peptide hormone secreted by the parafollicular cells (also known as C cells) of the thyroid gland. Its primary function is to lower (decrease) the level of calcium in the blood (hypocalcemic effect) when it becomes too high. It achieves this by inhibiting osteoclast activity in bones (reducing bone resorption) and stimulating calcium excretion by the kidneys. It has the opposite effect of parathyroid hormone (PTH), which increases blood calcium.