AH 1.2 Parts A and B

which term describes the entire set of proteins expressed by a genome

Why is the proteome actually larger than the number of genes

• As some genes are switched off

• as some genes are switched on

• as more than one protein can be produced from a single gene

• due to gene mutations creating new alleles

Name the process which can result in a greater number of proteins than genes

All of the genome codes for proteins

• True

• False

• dont know

• shuld know from Higher but dont

The genome contains non-coding RNA genes. These code for

• proteins

• polypeptide chains

• mRNA

• tRNA

Name the type of genes which code for tRNA and rRNA

select all of molecules which non-coding RNA genes can express to create

• RNA molecules that control the expression of other gene

• DNA molecules that control the expression of other gene

• Proteins

• tRNA & rRNA

• mRNA

The set of proteins expressed by a given cell type can vary over time and under different conditions

• True

• False

• dont know yet

Select all of factors affecting the set of proteins expressed by a given cell type

• response to signalling molecules

• metabolic activity of the cell

• Cell division

• Differentiation

• If cell is diseased

Eukaryotic cells have a system of internal membranes. What is the function of these?

• To package proteins

• increases volume: surface area ration

• increases the total area of membrane

• to regulate gene expression