1.Which of the following is not a form of aneuploidy in diploid organisms? Selec

Question

1.Which of the following is not a form of aneuploidy in diploid organisms?

Select one:

a. Nullisomy

b. Trisomy

c. Tetrasomy

d. Disomy

e. Monosomy

2.What would be the consequence of a diploid gamete (resulting from meiotic nondisjunction) being fertilized by a haploid gamete from the same species?

Select one:

a. Allotriploid

b. Autotriploid

c. Autotetraploid

d. Allodiploid

e. Allotetraploid.

3.With respect to their 3' and 5' ends, the two polynucleotide chains of a double-stranded DNA molecule are

Select one:

a. isotopes.

b. nitrogenous.

c. complementary.

d. antiparallel.

e. methylated.

4. Why was the idea that genes are made of nucleic acids not widely accepted until after 1950?

Select one:

a. DNA was not chemically stable for long enough to be a good method of storing genetic information.

b. Until the structure of DNA was understood, how DNA could store and transmit genetic information was unclear.

c. Proteins are more abundant than nucleic acids, so it seemed more logical that proteins would carry genetic information.

d. Nothing was known about the chemistry of DNA until after 1950.

e. Amino acids existed in the pre-biotic environment, so they would have most likely been the first to carry genetic information for life.

5.Which of the following is NOT a key characteristic that genetic material must possess?

Select one:

a. Genetic material must replicate faithfully.

b. Genetic material must contain complex information.

c. Genetic material must encode the phenotype.

d. Genetic material must have the capacity to vary.

e. Genetic material must contain nitrogen but not sulfur.

6.The bonds that connect nucleotides in a single strand are called ____________ bonds.

Select one:

a. hydrogen

b. glycosidic

c. phosphodiester

d. peptide

e. ionic

Explanation / Answer

1. d. Disomy (2n).

2. b. Autotriploid

3. c. complementary.

4. c. Proteins are more abundant than nucleic acids, so it seemed more logical that proteins would carry genetic information.

5. b. Genetic material must contain complex information.

6. c. phosphodiester

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