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WorksheetsAH 1.2 Parts A and B
Total questions: 22
Worksheet time: 17mins
which term describes the entire set of proteins expressed by a genome
(a)
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
(a)
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
(a)
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
The (a) forms a network of membrane tubules continuous with the nuclear membrane
The ____ ______ is a series of flattened membrane discs
(a)
(a) are membrane-bound organelles containing a variety of hydrolases that digest proteins, lipids, nucleic acids and carbohydrates
Lysosomes are membrane-bound organelles containing a variety of (a) that digest proteins, lipids, nucleic acids and carbohydrates
The function of (a) is to transport materials between membrane compartments
Synthesis of membrane components Lipids and proteins are synthesised in the ER. Which type of ER synthesises lipids?
endoplasmic reticulum
rough ER
smooth ER
Golgi ER
Synthesis of membrane components Lipids and proteins are synthesised in the ER. Which type of ER synthesises proteins?
endoplasmic reticulum
rough ER
smooth ER
Golgi ER
why is the RER described as being rough (not a 1 word answer)
(a)
Why type of ER contains ribosomes
Rough
Smooth
Neither
Dont know yet
The synthesis of all proteins begins in (a) ribosomes
Transmembrane proteins carry a signal sequence, which halts (a) and directs the ribosome synthesising the protein to dock with the ER, forming RER
true or false: The synthesis of all proteins begins in cytosolic ribosomes and proteins then remain in the cytosol
True
False
