Cell biology worksheet with answers

Which structure is found in plant cells but not in animal cells?

1. ACell wall
2. BCell membrane
3. CMitochondria
4. DRibosomes

When human muscle cells lack oxygen, pyruvate is converted into:

1. ALactate
2. BAcetyl-CoA
3. CGlucose
4. DEthanol

Which structure helps organise microtubules in animal cells and contains a pair of centrioles?

1. AVacuole
2. BCentrosome
3. CNucleolus
4. DRibosome

How do steroid hormones such as cortisol mainly act on their target cells?

1. AThey bind a membrane receptor and open ion channels, changing the cell's membrane potential
2. BThey cross the membrane and bind intracellular receptors that change gene transcription
3. CThey are taken up by phagocytosis and digested
4. DThey activate adenylyl cyclase from outside the cell

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

1. ASecondary active transport
2. BPrimary active transport
3. CFacilitated diffusion
4. DSimple diffusion

Where in the cell does the citric acid (Krebs) cycle take place?

1. AIntermembrane space
2. BCytoplasm
3. CInner mitochondrial membrane
4. DMitochondrial matrix

With 23 chromosome pairs, how many different chromosome combinations can independent assortment alone produce in human gametes?

1. A23²
2. B2 × 23
3. C46
4. D2²³ (about 8 million)

In damaged tissue, cells swell, their membranes burst and the area becomes inflamed. Which type of cell death is this?

1. ANecrosis
2. BApoptosis
3. CMitosis
4. DSenescence