Molecules made primarily of carbon and hydrogen are called hydrocarbons. How many hydrogen atoms are present in each of the following molecules? A ring of six carbon atoms held together by alternating single and double bonds?
A. 6
B. 8
C. 10
D. 12
Answer A
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An obligate anaerobe is an organism that:
A. is poisoned by oxygen B. requires oxygen C. can use oxygen but can get along without it D. produces oxygen E. has none of the options listed
In the logistic model of population growth, what is expected to happen to r when N = K?
a. r will approach rmax b. r will approach 1 c. r becomes negative d. r = 0 e. r > 0
How are receptor tyrosine kinases and steroid hormone receptors similar?
A. Both have a site for binding ligand. B. Both are transmembrane proteins with a single transmembrane domain. C. Both are activated by autophosphorylation. D. Both have a DNA-binding domain.
The total magnification using a 10 ocular and a 100 objective would be (110/1000/10000)×. (Be sure your answer is a numeral.)
What will be an ideal response?