Based on this figure, if a plant and non-plant mitochondrial genome contains the same gene, does it have a common ancestor? Why or why not?
What will be an ideal response?
ANS:
Yes. All mitochondrial genes originated from one acquisition of mitochondria, thus all mitochondrial genes have one ancestral origin.
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One of the ways agricultural production of such fruits as tomatoes or cucumbers can be increased significantly is to grow them in:
A. soils rich in magnesium B. soils rich in nitrogen C. greenhouses supplied with extra carbon dioxide D. greenhouses with extra oxygen E. None of these is true
Which of the following would decrease central venous pressure?
A) increased respiratory activity B) standing up C) activity of skeletal muscles D) increased blood volume E) increased sympathetic activi
The recessive allele of a gene causes cystic fibrosis. For this gene among Caucasians, p = 0.98. If a Caucasian population is in Hardy-Weinberg equilibrium with respect to this gene, what proportion of babies is born homozygous recessive and therefore suffers cystic fibrosis?
A) (0.02)2 = 0.0004
B) 0.02
C) (0.98)2 = 0.9604
D) 2(0.02 × 0.98)= 0.0392
The interaction of two or more polypeptide chains in a hemoglobin molecule is its ____ structure.
A. primary B. secondary C. tertiary D. quaternary E. combined