During chemiosmosis, __________ are transferred from NADH and FADH2 to electron acceptor
molecules, and the energy released is used to create a(n) __________ gradient across the inner
mitochondrial membrane.
a. protons; electron
b. electrons; proton
c. ATP molecules; ADP molecule
d. ADP molecules; ATP molecule
e. water molecules; oxygen
B
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Imagine that you are an interior architecture/biology double-major. While at home during break, one of your friends asks you to design and help build a spiral staircase that is modeled after a DNA molecule
The stair case must have 12 steps, and each step needs to be 6-feet wide. You say, "OK, as long as you provide the materials." So, your friend asks you for a list of materials needed to build the staircase. Which of the following includes the items necessary to make a staircase that is based on the molecular structure of a DNA molecule? A. 1 railing and 12 boards (each of which is 6- feet wide) B. 2 railings and 12 boards (each of which is 6-feet wide) C. 2 railings and 24 boards (12 that are 2-feet long and 12 that are 4-feet long) D. 2 railings and 24 boards (each of which is 3-feet long) E. 1 railing and 24 boards (12 that are 2-feet long and 12 that are 4-feet long) F. 1 railing and 24 boards (each of which is 3- feet long)
Target tissues often have receptors for multiple hormones. The response of the target tissue may depend on ____
a. blood levels of and coordinated activities of several hormones secreted by different glands, only b. blood levels of the hormones that affect it only c. coordinated activities of several hormones secreted by different glands only d. the effects of other signaling molecules, such as prostaglandins only e. blood levels of, coordinated activities of several hormones secreted by different glands, and the effects of other signaling molecules, such as prostaglandins
Which is a correct description of hormone action?
A. FSH stimulates Leydig cells in the testes. B. LH stimulates Sertoli cells in the testes. C. Testosterone stimulates corpus luteum. D. GnRH stimulates the anterior pituitary gland. E. Testosterone regulates LH and FSH in a positive feedback loop.
Matthias Schleiden was a German botanist (plant scientist) and co-founder of cell theory, along with the physiologist Theodor Schwann. Schleiden determined that all the tissues of all the plants he studied were composed of cells, and Schwann discovered the same was true of all the animal tissues he studied. Together they concluded which of the following statements was true?
A. That plants, but not animals, are composed entirely of cells. B. That animals, but not plants, are composed entirely of cells. C. That some plants and animals are composed of cells. D. That all plants and animals are composed of cells.