Which statement about the PiZ allele is not true? Consult Figure 15.2 if necessary
A. The PiZ allele is common in populations of
European descent.
B. One out of 30 Caucasians in the United
States is heterozygous for the PiZ allele.
C. Individuals homozygous for the PiZ allele
have normal lung elasticity.
D. Nonsmokers who are homozygous for the
PiZ allele have a life-expectancy of 65 years.
E. Smokers who are homozygous for the PiZ
allele have a life-expectancy of 40 years.
C
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Primary endosymbioses gave rise to ________ and secondary endosymbioses gave rise to ________
A) chloroplasts in algae / chloroplasts in plants B) mitochondria in eukaryotes / chloroplasts in eukaryotes C) chloroplasts and mitochondria in plants and red and green algae / chloroplasts in other eukaryotes D) chloroplasts and mitochondria in green and red algae / chloroplasts and mitochondria in diatoms
The oxygen produced by a plant comes most directly from
A. CO2. B. H2O. C. C6H12O6. D. glyceraldehyde-3-phosphate.
Suppose you have type A blood (genotype IAi). To whom can you safely donate blood?
a. to people with type A only b. to people with type AB only c. to people with type O only d. to people with types A and AB
How many protein-encoding genes constitute the human genome?
A. 46 B. about 25,000 C. more than 1 million D. 500,000