Can you please write a brief explanation of why its the right answer. Thanks. 33

Question

Can you please write a brief explanation of why its the right answer. Thanks.

33. Why does active transport require energy?

A. To move material from low to high concentration areas, a cell must perform work.

B Cells require energy to carry out all their functions, including active transport

C. This question is invalid because active transport does not require energy

37. Insulin is a protein that is produced by pancreatic cells and secreted into bloodstream. which of the following options correctly lists the order of the structures through which insulin passes from its production to its exit from the cell?

A. Rough ER, transport vesicles, Golgi Apparatus transport vesicles, cell membrane

B. Rough ER, lysosomes, tranport vesicles, cell membrane

C. Rough ER, Golgi Apparatus smooth ER, cell membrane

40. What is the main funtion of ribosomes?

A Production of proteins

B. Production of lipids

C. Breakdown of carbohydrates

41. Most of the functions of a cell membrane are performed by?

A. Carbohydrates

B. Proteins

C Chlolestrol

42. The function of chlorplast is?

A. Breaking down carbohydrates during cellular respiration

B. Producing carbohydrates by performing photosynthesis

C. Getting energy by performing breaking down lipids

43. The cardic muscle cells of your heart will work non stop from the day you became an embryo until the day you die. because of this your cardiac muscle cells have high numbers

A. Mitochondria

B. Vacuoles

C. Golgi Apparati

49. When a plant performs photosynthesis, where is it storing energy?

A. In the nuclei of the carbohydrates atoms

B. In the protons of the carbohydrate atoms

C. In the bonds of carbohydrates

50. What happens to ATP When a cell needs to get energy from it?

A. Atp does not change in any way

B. ATP enters a chloroplasts to release its stored energy

C a phosphate group separates from ATP and ATP becomes ADP

Explanation / Answer

33). A. To move material from low to high concentration areas, a cell must perform work.

Active transport: Active transport needs energy in the form of ATP (adenosine triphosphate), and it helps to move ions against their concentration gradients /(from low to high) using carrier molecules.

For example, The Na+/K+ ATPase pump transports sodium and potassium ions against their concentration gradients. For every three sodium ions pumped out of the cell, two potassium ions enter into the cell. Thus, the membrane potential is maintained.

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