Polypeptides (proteins) are composed of amino acids as ________ are composed of DNA.

A. genes
B. RNA
C. proteomes
D. lipids
E. metabolites


Answer: A

Biology & Microbiology

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Which of the following is an internal defense in the body’s innate immune system?

a. Antibodies b. B cells c. Memory response d. Natural killer cells

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Which of the following metabolic system descriptions is mismatched?

A. Linear - the product of enzyme A becomes the substrate for enzyme B B. Cyclic - the starting molecule is regenerated to initiate another turn C. Convergent - a linear pathway branches into two or more alternative processes D. Divergent - one or more branches deviate from a linear path

Biology & Microbiology

________ are events that have a greater impact on the population as conditions become more crowded

Fill in the blank(s) with correct word

Biology & Microbiology

It is possible to take a mature fern frond and rub the circular brown growths on the lower surface over a wet plug of peat moss. Soon small heart-shaped green structures grow on the nutritious peat moss plugs. What has happened?

A. Spores released from the underside of the frond germinated on the peat plug and formed the gametophyte called a prothallus. B. Zygotes released from the bottom of the fern frond germinated on the peat plug and grew into gametophyte fiddleheads. C. Gametes released from the underside of the fern frond germinated on the peat plug and formed a sporophyte structure called an archegonium. D. Eggs and sperm released from the underside of the fern frond united on the peat plug and grew into sporophyte prothalli. E. Spores released from the underside of the fern frond germinated on the peat plug and formed sporophyte rhizomes that give rise to many indusium.

Biology & Microbiology