A DNA nucleotide contains all of the following except _____.

A) a sugar
B) a phosphate group
C) an amino acid
D) a nitrogen-containing base


Ans: C) an amino acid

Biology & Microbiology

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Which of these groups is most closely related to bonobos?

a. tarsiers b. humans c. lorises d. gorillas e. new world monkeys

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The most common metabolic waste product is ____

a. urea b. carbon dioxide c. ammonia d. oxygen e. electrolytes

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The primary function of focal contacts is

A) cell–ECM adhesion. B) cell–cell adhesion. C) cell–cell communication. D) paracellular pathway regulation. E) establishing cell polarity.

Biology & Microbiology

Which of the following choices most likely lists the sizes of the four DNA fragments in lane 6 (from top to bottom) of this agarose gel stained with ethidium bromide? (Note: The well that the DNA was loaded into is at the top of the gel image.)

A) 600 bp, 450 bp, 300 bp, 100 bp B) 100 bp, 300 bp, 450 bp, 600 bp C) 400 bp, 300 bp, 600 bp, 100 bp D) 300 bp, 400 bp, 100 bp, 600 bp E) DNA fragment size can't be estimated using an agarose gel.

Biology & Microbiology