Biology 4th Six Weeks Test Review

Identify components of this molecule. DNA is an example.

• nitrogen base, 5 carbon sugar, phosphate group

• nitrogen base, 6 carbon sugar, phosphate group

• fatty acid, glycerol

• amino group, carboxyl group, R group

The molecule shown in the diagram contains information for self-replicating life. Identify the molecule.

• cellulose

• RNA

• DNA

• ATP

One strand in a molecule of DNA contains the sequence below. CGGATAGC Which sequence is the complementary strand?

• ATTGCGTA

• UAACGCAU

• TAACGCAT

• GCCTATCG

One strand in a molecule of DNA is represented by the sequence below. AGTTACA. Which of the following does each letter represent?

• a sugar

• a nitrogenous base

• a protein

• a phosphate group

The only difference in the chemical structure of DNA between various organisms is —

• the number of bases in a codon

• the type of nucleotides present

• the variety of bases

• the order of base pairs

Which of these can be found in RNA but not DNA?

• ribose sugar

• helical structure

• adenine

• phosphate group

The genetic code is the set of instructions that translates genetic material into proteins. This code defines how sequences of three nucleotides specify which amino acid will be added next during protein synthesis. Each sequence of three nucleotides is called —

• a protein

• a codon

• a DNA molecule

• a mutagen

How are the base-pairing rules different for RNA than DNA?

• In RNA, Guanine is replaced with Uracil.

• In RNA, Cytosine is replaced with Uracil.

• In RNA, Adenine is replaced with Uracil.

• In RNA, Thymine is replaced with Uracil.

Use the following codon chart to see what amino acid chain would come from this mRNA strand: 5' AUGAUACAAUUA 3'

• Methionine - Tyrosine - Asparagine - Leucine

• Leucine - Glutamine - Isoleucine - Methionine

• Methionine - Isoleucine - Glutamine - Leucine

• Isoleucine - Methionine - Glutamate - Leucine

A mutation that results in a nucleotide being inserted into the DNA sequence is referred to as --

• deletion

• substitution

• insertion

• inversion