Unit 6 Study Guide Genetics

Proteins are chains of amino acids bonded together. Which is the correct sequence for making proteins?

• Primase

• Helicase

• Ligase

• DNA Polymerase

Which of the following describe genes?

• a set of instructions encoded in mRNA

• a set of instructions encoded in DNA

• a set of instructions encoded in tRNA

• a set of instructions encoded in a protein

What are the components of a nucleotide?

• nitrogen base, phosphate group, and pentose sugar

• nitrogen base and a phosphate group

• pentose sugar, purine, and pyrimidine

• . DNA, phosphate group, monosaccharide

The backbone of DNA is made up of _______ & ________ units.

• . sugar & base

• . base & phosphate

• sugar & phosphate

• phosphate & phosphate

What would terminate translation?

• the arrival of a transfer RNA molecule to the A site of the ribosome

• . the transcription and processing of a new RNA molecule

• the arrival of the ribosome to a stop codon, such as UGA

• the attachment of a complementary codon to another codon

Given a DNA strand of gga-ctc-ctc-ttcaga, if it becomes gga-atc-ctc-ttc-aga, this is an example of

• substitution mutation

• . insertion mutation

• deletion mutation

• . non-disjunction.

A change in the normal nitrogenous base sequence of a DNA molecule is known as a

• gene mutation

• non-disjunction

• hybridization

• segregation

Which chromosome represents an alteration known as a deletion?

• 1

• 2

• 3

• 4

B represents the gene for brown coat color in a certain species of rabbit and b represents the gene for white coat color. A breeder crosses a Homozygous Brown rabbit with a white rabbit. Which of the following represents the genotypes for these parents.

• BB x bb

• BB x Bb

• Bb x Bb

• Bb x bb

A mutagenic process that alters the chromosome segment by repeating one or more segments is referred to as

• substitution

• crossing over

• deletion

• duplication