Genetics Review

In humans, where does DNA replication take place?

• Cytoplasm

• Nucleus

• Ribosome

• Vacuole

A sequence of nucleotides found in the DNA of a chromosome codes for a specific protein or trait. This section of DNA is known as a(n)

• Allele

• Codon

• Gene

• Phenotype

RNA from a chipmunk is compared to RNA from a worm. Both will contain the

• A sugar deoxyribose and the base thymine

• A sugar deoxyribose and the base uracil

• Sugar ribose and the base thymine

• Sugar ribose and the base uracil

A scientist is doing an experiment to identify different molecules. Which of the four molecules is the DNA, based on the table to the right?

• Molecule 1

• Molecule 2

• Molecule 3

• Molecule 4

The diagram shown here represents a portion of a nucleic acid molecule. The part indicated by the arrow could be

• deoxyribose, cytosine, and a lipid

• deoxyribose, thymine, and a phosphate group

• ribose, uracil, and a polypeptide

• ribose, adenine, and thymine

A DNA nucleotide could contain the following molecules

• deoxyribose, cytosine, and a lipid

• deoxyribose, thymine, and a phosphate group

• ribose, uracil, and a polypeptide

• ribose, adenine, and thymine

Which of the following nucleic acids contains thymine?

• DNA only

• transfer RNA only

• messenger RNA only

• DNA, mRNA and tRNA

Base your answer to this question on the diagram shown to the right AND on your knowledge of biology. Structures 3 and 4 are held together by

• weak peptide bonds

• strong hydrogen bonds

• weak hydrogen bonds

• strong peptide bonds

DNA is a polymer consisting of monomers known as

• Peptides

• Amino Acids

• Phosphates

• Nucleotides

In nucleotides, the letters A, G, C, and T represent

• A phosphate group

• Nitrogen Bases

• Ribose Sugars

• Deoxyribose Sugars