The double helix structure describes the shape of ____
a. RNA
b. proteins
c. three dimensional proteins
d. DNA
e. ribosomes
ANSWER: d
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Many insects can sense ultraviolet light. What evolutionary advantage does this ability provide the insect?
A. the ability to detect predators B. the ability to locate flowers for nectar, their food source C. the ability to avoid other flying insects D. the ability to sense balance and position
Mutagenic chemicals that ____ and are incorporated into DNA or RNA during synthesis are called base analogs
a. resemble nucleotides b. resemble genes c. resemble amino acids d. cause deletion mutations e. cause frameshift mutations
Which of the following is NOT an amniote?
a. turtles b. frogs c. humans d. eagles e. more than one of these is NOT an amniote
Which of the following pairs of hormones regulates the calcium levels of the blood?
a. thyroxin and parathyroid hormone b. adrenocorticotropic hormone and thyroid stimulating hormone c. prolactin and oxytocin d. parathyroid hormone and calcitonin e. calcitonin and thyroxin