The work of James B. Sumner was to

A) discover ribozymes.
B) prove that enzymes were carbohydrates.
C) isolate the insulin hormone.
D) originate the term ferments to describe enzymes.
E) crystallize urease, the first enzyme isolated.


E) crystallize urease, the first enzyme isolated.

Biology & Microbiology

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Water has an unusually high boiling point for its molecular weight because water molecules ____

a. are very dense b. get much heavier as they are heated c. are held to each other by hydrogen bonds d. are held together by covalent bonds e. form hydration layers

Biology & Microbiology

A man and woman are each heterozygous for the autosomal recessive gene for albinism. They already

have two non-albino children and want to have two more. What is the probability that their next two children will be phenotypically identical to each other with regard to skin color (i.e., either both albino or neither albino)?

a. 1/16 b. 3/16 c. 4/16 d. 9/16 e. 10/16

Biology & Microbiology

Which of the following can impact methylation

patterns? a. drugs. b. exercise. c. stress. d. diet. e. all of these

Biology & Microbiology

A Pap test checks for cancer of the

A. ovary. B. oviduct. C. vagina. D. uterus. E. cervix.

Biology & Microbiology