HHB 1.3 Gene Expression

A section of DNA that carries the instructions to produce a protein is known as

• mRNA

• a gene

• transcription

• translation

Only a fraction of the genes in a cell are expressed at anyone time.

• True

• False

Which statement best describes RNA?

• Double stranded, composed of nucleotides

• Single stranded, composed of nucleotides

• Single stranded, composed of bases

• Double stranded, composed of bases.

RNA nucleotides are composed of

• a base, ribose sugar and a hydrogen

• a base, deoxyribose sugar and a hydrogen

• a base, deoxyribose sugar and a phosphate

• a base, ribose sugar and a phosphate

In RNA, which base replaces Thymine?

Identify the type of RNA that forms the ribosome along with proteins?

• mRNA

• tRNA

• rRNA

Which type of RNA carries a complementary copy of the DNA code from the nucleus to the ribosome?

• mRNA

• tRNA

• rRNA

Which type of RNA folds due to complementary base pairing?

• mRNA

• tRNA

• rRNA

What term is used to describe a triplet of bases on a strand of mRNA?

What term is used to describe a triplet of exposed bases on a tRNA molecule?