Biology

Plants have cellulose in their cell walls, which provides structural support, while animals lack cellulose. This distinguishes plant cells from animal cells.

Glutamic acid is an amino acid, which is a fundamental biomolecule involved in protein synthesis. The other acids listed are organic acids but are not classified as biomolecules essential to living organisms.

Myopia, or nearsightedness, occurs when the eye focuses images in front of the retina. It is corrected using concave lenses, which diverge light rays so they focus correctly on the retina.

Hepatitis A is primarily transmitted through the fecal-oral route, meaning it spreads via ingestion of food or water contaminated with feces from an infected person. Therefore, 'Faeces' is the correct answer, not 'Water' alone.

A chicken egg is a single cell, known as an ovum, which is one of the largest cells visible to the naked eye. It is not composed of multiple cells but is a single cell containing the yolk and surrounded by the egg white and shell.

Bone remodeling involves osteoblasts, which build new bone; osteoclasts, which resorb bone; and osteocytes, which regulate the process and maintain bone tissue. Therefore, all these cell types participate in bone remodeling.

Gastrin is a hormone that stimulates the secretion of gastric acid in the stomach, not a digestive enzyme. Pepsin, trypsin, and ptyalin are all enzymes involved in the digestion of proteins and carbohydrates.

Anti Diuretic Hormone (ADH) is secreted by the posterior pituitary gland, which regulates water balance in the body by controlling the amount of water reabsorbed by the kidneys.

The muscles located at the back of the thigh are known as the hamstrings. They include the biceps femoris, semitendinosus, and semimembranosus muscles, which are responsible for knee flexion and hip extension.

Cancer treatment commonly involves chemotherapy and radiotherapy, which target and kill cancer cells. Antibiotics and vaccines are not standard treatments for cancer.