21. The \"natural\" function of restriction endonucleases is to2p) a. protect ba

Question

21. The "natural" function of restriction endonucleases is to2p) a. protect bacterial cells from invasion by viruses (bacteriophages). b. help bacteriophages infect cells. c. regulate gene expression from specific promoters. d. remove chromatin from histones. e. All of the above 22. The standard state usually used in biochemistry (AG) includes(2pt) a. all concentrations at 1 M. M. b. all concentrations at 1 M, except for [H'), which is 10- c. Pure liquids. d. Pure liquids at 1 atm. e. None of the above (2 pt) 23. The production of larger molecules from smaller ones is called a. metabolism. b. catabolism. c. anabolism. d. none of these 24. In general, catabolism(2pt) a. is an oxidative process that releases energy b. is a reductive process that releases energy c. is an oxidative process that requires energy d. is a reductive process that requires energy e. None of the above 25. What does "oxidation" refers too? (2 pt) a. the loss of oxygen. b. the gain of oxygen. c. the loss of electrons. d. the gain of electrons. e. None of the above.

Explanation / Answer

21. Correct answer:- (a) protect bacterial cells from invasion by virus (macrophages)

    Explanation:- bacteriophage are the virus that infect bacteria.
- bacteria contain Restriction endonuclease enzyme that cause lysis of bacteriophage and protect them.

22. Correct answer:- (a) all concentration at 1 M
23. Correct answer:- (c) anabolism
           Explanation:- anabolism is production of larger molecules from smaller ones.
24. Correct answer:- (c) oxidative process that requires energy
25. Correct answer:- (d) gain of Electeon
          

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