Mitochondria contain
a. no genes of their own.
b. genes for mitochondrial proteins.
c. genes for mitochondrial proteins and rRNAs.
d. genes for mitochondrial proteins, rRNAs, and tRNAs.
Ans: d. genes for mitochondrial proteins, rRNAs, and tRNAs.
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In pea plants, flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production of anthocyanins is a two-step process; the first is controlled by the C gene and the second by the P gene
Both genes must produce functional proteins for anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional proteins. You cross two pea plants, each with the genotype CcPp. What proportion of their offspring will have white flowers? A. 13/16 B. 9/16 C. 7/16 D. 3/4 E. 1/4
Celiac disease is an autoimmune disorder which destroys the microvilli of the small intestine. Vitamin B12 can be absorbed by passive diffusion across the microvilli of the small intestine. Consider a patient who has had 10% of their microvilli destroyed. If the concentration of vitamin B is 0.6 pg/ml inside the lumen of the small intestine and 0.3 pg/ml on the inside of an epithelial cell, how
is the diffusion rate of vitamin B altered in this patient? A. It is reduced by 10%. B. It is reduced by .003%. C. It is increased by 10%. D. It is reduced by .3%. E. It is increased by .3%.
Atmospheric nitrogen is
A. used directly by plants. B. used directly by animals. C. turned into ammonia by microorganisms. D. directly used to make carbohydrates
A cinereous mourner bird’s chicks resemble the poisonous larvae of flannel moths. This is an example of____
a. aposematic coloration b. Müllerian mimicry c. competitive exclusion principle d. cryptic coloration e. Batesian mimicry