Cell biology worksheet with answers

Proteins are polymers of which monomers?

1. ASimple sugars
2. BAmino acids
3. CGlycerol molecules
4. DNucleotides

What are the building blocks (monomers) of DNA called?

1. ANucleotides
2. BAmino acids
3. CMonosaccharides
4. DFatty acids

Which organelle breaks down hydrogen peroxide using the enzyme catalase?

1. APeroxisome
2. BGolgi apparatus
3. CRibosome
4. DLysosome

Gut epithelial cells take up glucose against its gradient with a sodium–glucose cotransporter. What kind of transport is this?

1. ASimple diffusion
2. BFacilitated diffusion
3. CPrimary active transport
4. DSecondary active transport

How does glucose enter most body cells, such as red blood cells?

1. ABy simple diffusion through the lipid bilayer
2. BBy phagocytosis
3. CBy facilitated diffusion through GLUT carrier proteins
4. DBy primary active transport using ATP directly at the membrane

Which motor protein generally carries cargo along microtubules towards the minus end, near the cell centre?

1. ADynein
2. BActin
3. CMyosin
4. DKinesin

In the intrinsic (mitochondrial) pathway of apoptosis, which event leads to caspase activation?

1. ABinding of a death ligand to the Fas receptor on the cell surface
2. BEntry of glucose into the mitochondria
3. CFusion of lysosomes with the nucleus
4. DRelease of cytochrome c from mitochondria into the cytosol

In E. coli, under which conditions is the lac operon most strongly transcribed?

1. ALactose absent and glucose present
2. BBoth lactose and glucose present
3. CLactose present and glucose absent
4. DBoth lactose and glucose absent