Put the following steps of the light reactions in the correct order:
1. Light excites an electron from photosystem I.
2. Light excites an electron from photosystem II.
3. Electrons reduce NADP+ to NADPH.
4. Electrons pass through an electron transport chain, which generates a H+ gradient used to make ATP.
A) 1, 2, 3, 4
B) 1, 4, 2, 3
C) 2, 4, 1, 3
D) 2, 3, 1, 4
Answer: C
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Indicate whether this statement is TRUE or FALSE.
You wish to determine which organs function to remove waste products from the hemolymph (blood) of an insect. You do so by injecting a suspension of particulate dye particles into the abdominal cavity of an anesthetized cricket.Where will you find these dye particles 45 minutes later, after you euthanize and dissect the cricket?
A. in the urinary bladder B. in the nephridia C. in the antennal glands D. in the Malpighian tubules E. in the protonephridia F. in the nephrons of the kidneys Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about insect physiology? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Where does a dendritic cell present antigen to naive T cells?
a. thymus b. blood c. bone marrow d. lymph node or spleen e. interstitial fluid
Which one of the following statements about the BRCA1 gene for breast cancer is FALSE?
A. It was discovered by Mary-Claire King and her colleagues. B. The gene is also linked to ovarian cancer. C. One mutated copy of BRCA1 is sufficient to cause cancer. D. Although only 1 in 200 females inherit it, 90 percent of them will develop breast cancer. E. It is located on the long arm of chromosome 17.