Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids. How many different types of amino acids are used to construct proteins?
A. 2
B. 20
C. 146
D. 200
B. 20
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Apical dominance is maintained by ____
a. hormones released by the terminal bud b. sugars produced in the leaves c. water transported from the roots d. hormones released by the lateral buds e. sugars produced in the lateral buds
In bacteria, genes that are often used together are controlled by a single promoter. Explain why this is the case
What will be an ideal response?
Which of the following animals has a closed
circulatory system?
a. clams b. bees c. rabbits d. earthworms e. more than one of these animals
AMP-PNP is a non-hydrolyzable analog of ATP that can bind to proteins in a similar manner as ATP but is no longer hydrolyzed. Predict what would happen to helicase activity if AMP-PNP were added to a DNA replication reaction.
A. Helicase would no longer function, since the AMP-PNP is not hydrolyzed. ATP binding and hydrolysis induce the conformational changes that facilitate DNA unwinding by helicase. B. Helicase would function normally, since AMP-PNP is not the same as ATP and would not bind to helicase. C. Helicase would function faster than normal, since the AMP-PNP is not hydrolyzed. ATP binding induces conformational changes, but hydrolysis slows DNA unwinding by helicase. D. Helicase would function normally, since AMP-PNP is an analog of ATP and would function in the place of ATP.