Test Bank for Molecular Biology, 5th Edition by Robert Weaver

Test Bank for Molecular Biology, 5th Edition by Robert Weaver

1. Which of the following scientists provided definitive evidence for the chromosomal theory? A. Mendel

B. Morgan

C. McClintock

D. Miescher

E. Avery

Bloom's Level: 1. Remember

Section 01.01

2. Who conducted the X-ray diffraction studies of DNA?

A. Franklin and Wilkins

B. Miescher and McClintock

C. Watson and Crick

D. Meselson and Stahl

E. Avery and Beadle

Bloom's Level: 1. Remember

Section 01.02

3. The chromosomal theory of inheritance holds that A. chromosomes vary in size.

B. the number of chromosomes vary in individuals.

C. chromosomes contain histone proteins.

D. genes are arranged in a linear order on chromosomes.

E. chromosomes condense during mitosis.

Bloom's Level: 1. Remember

Section 01.01

4. Evidence that physical recombination occurs between two chromosomes was provided by A. McClintock and Creighton.

B. Watson and Crick.

C. Avery, McLeod and McCarthy.

D. Hershey and Chase.

E. Miescher and Morgan.

Bloom's Level: 1. Remember

Section 01.01

5. During an experiment with drosophila, it was discovered that all females had red eyes. A conclusion based on this observation would be:

A. the gene for eye color is located on the X chromosome.

B. the eye color phonotype is sex-linked.

C. the females are homozygotes.

D. the gene for eye color is located on an autosome.

E. choices the gene for eye color is located on the X chromosome and the eye color phonotype is sex-linked are both correct.

Bloom's Level: 5. Evaluate

Section 01.01

6. Which of the following is true about wild-type organisms? A. They are always found in the wild.

B. They are free of all mutations.

C. They are also referred to as standard-types.

D. They carry no recessive genes.

E. None of the choices is correct.

Bloom's Level: 1. Remember

Section 01.01

7. Some genes located on the same chromosome do not show perfect linkage because A. they are too close together.

B. they are interrupted by other genes.

C. crossover events occur between homologous.

D. some genes are deleted.

E. too many alleles are present.

Bloom's Level: 2. Understand

Section 01.01

8. Which of the following statements is not true regarding genetic mapping? A. Genes are arranged in a linear order on chromosomes.

B. Recombination occurs between chromosomes.

C. There is a mathematical relationship between the distance separating two genes and the recombination frequency.

D. Mapping is used to establish the location of genes relative to each other.

E. Mapping is used to determine the composition of a gene.

Bloom's Level: 2. Understand

Section 01.02

9. Which of the following was demonstrated by Frederick Griffith? A. Nuclein was the possible genetic material.

B. A genetic trait can be transferred from one organism to another.

C. Genes are linked.

D. Crossing over occurs between chromosomes.

E. Protein is a major component of nuclein.

Bloom's Level: 1. Remember

Section 01.01

10. The relationship between genes and enzymes was shown by A. Watson and Crick.

B. Beadle and Tatum.

C. Avery and McLeod.

D. Morgan and Mendel.

E. Miescher and Stern.