Eukaryotic DNA methylation occurs on which base?

A. guanine
B. cytosine
C. thymine
D. adenine
E. thymine and adenine


B. cytosine

Biology & Microbiology

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What gland secretes fructose, which provides energy for sperm, into the seminal fluid?

a. prostate b. seminal vesicles c. bulbourethral d. vas deferens e. epididymus

Biology & Microbiology

Rarely, a chromosome's structure becomes altered when part of it undergoes __________,

__________, __________, or __________. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Ozone in the atmosphere shields us from ________

Fill in the blank(s) with correct word

Biology & Microbiology

A pure culture contains

A. only one species of microorganism. B. only bacteria. C. a variety of microbes from one source. D. a variety of species from the same genus. E. None of the choices is correct

Biology & Microbiology