Which of the following is NOT a characteristic of bacterial chromosomes?
A. they contain gene coding regions and regulatory regions
B. they are around 10× smaller than eukaryotic chromosomes
C. they are single-stranded
D. they have 10-base-pair regions that control DNA folding
E. they have only one origin of replication
Answer: C
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Surgical removal of the pancreas would
A. increase the acidity of the small intestine. B. prevent the production of chyme in the stomach. C. eliminate the ability to store bile in the gallbladder. D. block the secretion of bile. E. All of these changes would be a result of pancreas removal.
Due to gene transfer between the organelles and the nucleus,
A) mitochondrial genomes in all species have the same genes. B) a chloroplast from one plant species can be transferred to any other plant species. C) mitochondria and chloroplasts have genes that allow them to live independently. D) some proteins must be imported into organelles for their function. E) organelle genomes experience lower rates of mutation than they would if gene transfer did not occur.
Finch beaks don't grow or shrink much once the finch reaches maturity. What is responsible for the average beak size changing from year to year?
a) Different people were measuring the beaks and there was some error made. b) The average is made up from measures of many birds. c) Experimenter bias may have resulted in the change. d) More large birds were born each year than small birds. e) Beak size remains constant and doesn't change.
Which of the following mutations would not result in antibiotic resistance?
a. Missense mutation b. Nonsense mutation c. Silent mutation d. Frameshift insertion e. Frameshift deletion