Brown eye color requires (select all that apply):

a. one dominant allele and two recessive alleles
b. genes for the enzymes that synthesize the pigment melanin
c. phenylalanine, from which the melanin is made.


b. genes for the enzymes that synthesize the pigment melanin
c. phenylalanine, from which the melanin is made.

Biology & Microbiology

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One of the steps in converting normal cells into cancerous cells may be the ____________________ and silencing of both copies of the NOEY2 gene

Fill in the blank(s) with correct word

Biology & Microbiology

The ____ protects the heart and lungs

a. vertebral column b. pelvic girdle c. pectoral girdle d. ribs and sternum e. breastplate and pelvic girdle

Biology & Microbiology

Viruses that infect bacteria are:

a. Not known to exist b. Prions c. Bacteriophages d. Composed of protein only e. Also capable of causing disease in humans

Biology & Microbiology

By-products of cellular respiration include

A) NADH and ATP. B) carbon dioxide and ATP. C) FADH2 and NADH. D) carbon dioxide and water. E) oxygen and heat.

Biology & Microbiology