Relaying a message from a membrane receptor to a molecule that performs a specif

Question

Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell when A) a signaling molecule binds to a protein that extends to the outside of the molecule. B) a protein receptor on the interior of the membrane become bounds by a signaling molecule. C) glycoproteins are recognized by other cells. D) the extracellular to the inside of the cell. Which of the following statements regarding enzymes is true? A) Enzymes catalyze specific reactions. B) All enzymes depend on protein cofactors to function. C) An enzyme's function is unaffected by changes in pH. D) Enzymes are inorganic. Which of the following is dependent on the ability of water molecules to form hydrogen bonds with other molecules besides water? A) the ability of certain insects to walk on the surface of water B) the universality of water as a solvent C) the evaporative cooling of skin surfaces D) the milder temperatures of coastal regions compared to inland areas Many names for sugars end in the suffix A) acid. B) -hyde. C) -ase. D) -ose. As cell size increases, the A) ratio of surface area to volume stays the same. B) volume increases proportionally more than the surface area. C) surface area increases proportionally more than the volume. D) volume and surface area decrease.

Explanation / Answer

42. Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell occurs during signal transduction, when a signaling molecule binds to a protein that extends to the outside of the cell.

So the answer is: A. a signaling molecule binds to a protein that extends to the outside of the cell.

43. The only true statement here is: A. Enzyme catalyzes specific reactions.

Enzymes are highly specific to its substrates.

44. Water is a universal solvent. So water molecules can form hydrogen bonds with other molecules besides water.

So the answer is: C. the universality of water as a solvent.

45. Many sugars such as - Glucose, sucrose, fructose, maltose have suffix "-ose".

So the answer is: D. -ose.

46. As cell size increases, the ratio of surface area to volume decreases. This is because, as cell size increases although the surface area too increases but the volume increases proportionally more than the surface area.

So the answer is: B. volume increases proportionally more than the surface area.

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