Which of the following are examples of an antigen-presenting cell (APC)? 1. macr

Question

Which of the following are examples of an antigen-presenting cell (APC)? 1. macrophage 2. neutrophil 3. B cel1 4. T cell 5. plasma cell a. 1 and 2 b 1 and 3 c. 2 and 4 d. 3 and 5 Enzyme activity may be inhibited by a. the end product of the biochemical pathway for which the enzyme catalyzes the first reaction b. heat c. heavy metals d. all of these NADP, NAD and FAD are coenzymes that function as a. hydrogen ion and electron carriers b. vitamins c. cytochromes d. allosteric enzymes The energy yield from fermentation a. is the same as that from respiration b. is greater than that from respiration c. is less than that from respiration d. none of these In aerobic respiration a. glucose is converted to starch or glycogen b. ATP is formed when solar energy is converted to chemical energy c. glucose is reduced to CO_2 while O_2 is oxidized to water d. glucose is oxidized to CO_2 while O_2 is reduced to water Reverse transcriptase is used by ________ to make __________ from ______ a. Reoviruses: DNA: RNA b. retroviruses: DNA: RNA c. retroviruses: DNA: RNA d. retroviruses: RNA: DNA Causes formation of thymine dimers a. gamma rays b. cathode rays c. UV light d. ionizing radiation Which markers are found on all nucleated cells a. MHC class I molecules b. MHC class I1 molecules c. CD4 d. CD8 Restriction endonucleases a. cut DNA at a specific sequence of bases b. accelerate the replication of DNA c. restrict DNA synthesis d. synthesize new segments of DNA during repair

Explanation / Answer

12.Correct answer is:b.1 and 3.

13.Correct answer is: d.all of these.

14.Correct answer is: a.hydrogen ion and electron carriers.

15.Correct answer is:c.less than that from respiration.

16.Correct answer is:d.glucose is oxidised to CO2 while O2 is reduced to water.

17.Correct answer is :c.retroviruses,DNA,RNA

18.Correct answer is: c. UV light

19.Correct answer is :a.MHC class I molecules

20. Correct answer is : a. cut DNA at a specific sequence of bases.

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