Which of the following is an example of a prosthetic group?

A) a zinc ion
B) a glycine residue
C) a polypeptide chain
D) a nickel catalyst
E) carboxypeptidase A


A) a zinc ion

Biology & Microbiology

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You are bitten by a venomous snake at a nature center. A snake handler is also bitten. You are rushed to the emergency room and given an antiserum

The snake handler does not receive treatment because he said he was exposed to venom so many times that he is immune. What is antiserum and will you have long-lasting immunity to snake venom after this? Is what the snake handler said possible or should he also receive treatment? If he does not receive treatment and is not affected, what is protecting him? What will be an ideal response?

Biology & Microbiology

Synthetic versions of muscle-building

hormones are also known as ___ hormones.

a. anabolic b. catabolic c. metabolic d. bully e. nutritional

Biology & Microbiology

In the process of fertilization in conifers, the pollen tube grows to which structure?

a. archegonium b. antheridium c. microspores d. pollen grains e. microsporangia

Biology & Microbiology

Dissolved phosphorus in aquatic ecosystems may return to the land via:a

erosion. b. phosphate mining. c. birds eating fish and mollusks. d. zooplankton. e. decomposition

Biology & Microbiology