If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures, EXCEPT _____
A) antennae
B) an open circulatory system
C) an exoskeleton of chitin
D) complex eyes
E) sex organs
Answer: E
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You are studying the DNA of a person who you know has two defective copies of the gene that encodes phenylalanine hydroxylase. You are surprised to find that this person also carries two defective copies of the gene for homogentisic acid oxidase
What disease symptoms will this person exhibit? (Assume pathway intermediates are not available from sources outside the phenylalanine breakdown pathway.) A. This person will exhibit symptoms of alkaptonuria. B. This person will exhibit symptoms of tyrosinosis. C. This person will exhibit symptoms of phenylketonuria D. This person will exhibit symptoms of alkaptonuria and phenylketonuria. E. This person will be phenotypically normal.
Why does NADH produce more energy than FADH2?
a. FADH2 donates electrons to protein complex III as opposed to complex II. b. FADH2 requires more ATP to produce it and gives more energy back. c. NADH and FADH2 are synthesized in different steps of cellular respiration. d. NADH has a high free energy and can be oxidized more readily than FADH2. e. NADH supplies fewer electrons that are of a higher energy state than FADH2.
Edward Jenner’s work became the basis for worldwide ____ against ____
a. vaccination; polio b. vaccination; smallpox c. antibiotic treatment; polio d. antibiotic treatment; smallpox e. vaccination; chickenpox
Some simple epithelia have one layer that appears to be several layers due to the cells' nuclei not lining
up. This type of tissue is a. stratified. b. columnar. c. cuboidal. d. squamous. e. pseudostratified.