Refer to Figure 26-1. The function of the structure labeled 4 is:
a. food intake.
b. digestion.
c. waste elimination.
d. water discharge.
e. asexual reproduction.
A
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What enzyme catalyzes the attachment of amino acids to tRNA molecules?
A. helicase B. topoisomerase C. aminoacyl-tRNA synthetase D. ribosome E. translation factor
Some enzymes build new molecules, and others metabolize or break them down. For example, digestive enzymes such as peptidases and lipases break down proteins and lipids, respectively. Genetic information is encoded in the DNA for proteins, many of which are enzymes. This means that a harmful or lethal genetic mutation often results in a malformed enzyme that cannot function. If a person suffers a mutation that results in malformed peptidase, what problem would you expect them to would have?
a. unable to swallow medication properly b. high body temperature c. unable to digest protein d. unable to metabolize fats
In the Golgi, what type of protein modification will signal the polypeptide destination by determining the receptor to which the peptide will bind?
What will be an ideal response?
Which of the following does NOT belong with the others?
a. Animalia b. Fungi c. Helminthes d. Plantae e. Protista