KW HHB Unit 1 Gene expression

What does gene expression involve?

• only the transcription of DNA sequences

• the transcription and translation of RNA sequences

• the transcription and translation of DNA sequences

• only the translation of DNA sequences

What proportion of the genes in a cell are expressed?

• Only a fraction of the genes

• all of the genes

• none of the genes

• a large proportion of the genes

What are the types of RNA involved in transcription and translation?

• mRNAm and rRNA

• mRNA and tRNA

• rRNA and tRNA

• mRNA, rRNA and tRNA

RNA is ..................... stranded

• single

• double

What is a RNA nucleotide composed of?

• deoxyribose sugar, phosphate and one of four bases

• ribose sugar, phosphate and one of four bases

• ribose sugar, phosphate and one of three bases

• deoxyribose sugar, phosphate and one of three bases

What is the function of mRNA?

• carries a copy of the DNA code from the nucleus to the mitochondrion

• carries a copy of the DNA code from the ribosome to the nucleus

• carries a copy of the amino acids from the nucleus to the ribosome

• carries a copy of the DNA code from the nucleus to the ribosome.

where is mRNA transcribed from DNA?

• nucleus

• mitochondrion

• cytoplasm

• ribosome

Where is mRNA translated into proteins?

• In the nucleus

• At the mitochondrion in the cytoplasm

• At the ribosomes in the cytoplasm

• In the cytoplasm

What is each triplet of bases on the mRNA molecule called?

• a triplet

• a codon

• an anticodon

• a coder

What does each codon code for?

• a specific amino acid

• a random amino acid

• a protein

• a ribosome