Sweat glands produce (lysozyme/dermcidin/acid), which destroys the cell wall of bacteria by cleaving the bonds between the sugar subunits.
Fill in the blank(s) with the appropriate word(s).
lysozyme
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A closed-circular DNA in its relaxed form has a linking number (Lk) of 500 . What will happen to the linking number of this molecule if DNA gyrase and ATP are added to this DNA?
A. Lk will increase. B. Lk will decrease. C. Lk will stay the same. D. Lk becomes undefined. E. None of these choices is correct.
Acetylation adds a ____ group ____
a. CH3CO-; to the cytosine nucleotides of DNA b. CH3CH2-; to the DNA of a promoter sequence c. CH3CO-; to the histone protecting the transcription unit of a gene d. CH3CO-; to the histone protecting the promoter region of a gene e. CH3CH2-; to the RNA polymerase that will initiate transcription at the promoter region
Moisture and concentration of oxygen
A) are parts of an organism's environment. B) have no effect on the physiology of an organism. C) are biological conditions that impact an organism's survival. D) do not vary in the environment.
Which of the following is incorrect about termination codons?
A. Termination codons include UAA, UAG, UGA. B. Termination codons do not have corresponding tRNA. C. They are also called nonsense codons. D. Termination codons include AUG. E. They occur where the bond between the final tRNA and the growing polypeptide is broken.