Concept 25 Protein synthesis

Types of mutagens include

• radiation

• viruses

• bacteria

• all of these

When a mutated codon codes for a different amino acid, the mutation is called a

• silent mutation

• nonsense mutation

• missense mutation

• chromosomal mutation

Each gene codes for one

• codon

• nucleotide

• amino acid

• protein

Which type of RNA carries genetic information from the nucleus to a ribosome?

• rRNA

• tRNA

• mRNA

• none of these

The "backbone" of the DNA molecule consists of

• sugars

• phosphates

• nitrogen bases

• two of these

Some mutagens occur when errors are made in copying DNA

• true

• false

The genetic code is the same in all living things

• true

• false

The translation step of protein synthesis takes place in the nucleus.

• true

• false

RNA is a double-stranded nucleic acid

• true

• false

Uracil is a nitrogen base found only in RNA

• true

• false