MDCAT Biology MCQs

Correct answer B. Euchromatin is loosely coiled and genetically active

Correct answer D. It is the site where spindle fibres attach through the kinetochore

Correct answer B. Protecting the ends of chromosomes from erosion during replication

Correct answer B. By diffusion across a partially permeable membrane into dialysis fluid

Correct answer D. So that these useful substances are not lost from the blood by diffusion

Correct answer C. To maintain a concentration gradient along the whole membrane

Correct answer C. The peritoneum lining the abdominal cavity

Correct answer D. Rejection of the donor kidney by the recipient's immune system

Correct answer C. Hypothalamus

Correct answer B. Vasoconstriction of skin arterioles and shivering

Correct answer D. Evaporation of water from the skin absorbs latent heat

Correct answer B. It releases heat directly from respiration without shivering

Correct answer D. Urea

Correct answer D. Liver

Correct answer B. Ammonia is highly soluble and can be diluted by the large volume of water available

Correct answer D. Birds and reptiles

Correct answer C. It produces large volumes of dilute urine and actively absorbs salts through its gills

Correct answer A. Control of the water and solute balance of body fluids

Correct answer D. Singer and Nicolson

Correct answer D. Davson and Danielli model