Cell biology worksheet with answers

Which sugar is found in DNA?

1. ADeoxyribose
2. BRibose
3. CGlucose
4. DFructose

What does meiosis produce from one diploid cell?

1. AFour genetically identical haploid cells
2. BTwo genetically different diploid cells
3. CTwo genetically identical diploid cells
4. DFour genetically different haploid cells

Which process produces two genetically identical daughter cells?

1. AMeiosis
2. BMitosis
3. CMutation
4. DFertilisation

What directly drives ATP synthase to make ATP in mitochondria?

1. AGlucose binding to ATP synthase
2. BProtons flowing back into the matrix down their gradient
3. COxygen diffusing into the matrix
4. DElectrons from NADH flowing directly through ATP synthase

What is the G0 phase of the cell cycle?

1. AA resting state in which cells have left the cycle and stopped dividing
2. BA phase found only in cancer cells that have stopped responding to signals
3. CThe final stage of mitosis
4. DThe phase in which DNA is copied

A point mutation changes a codon for an amino acid into a stop codon. What type of mutation is this?

1. AFrameshift mutation
2. BNonsense mutation
3. CMissense mutation
4. DSilent mutation

Bacteria moved to a much colder environment change the fatty acids in their membranes. Which change keeps the membrane fluid?

1. AMore unsaturated fatty acids
2. BMore saturated fatty acids
3. CLonger fatty acid tails
4. DFewer membrane proteins

Tumour suppressor genes such as p53 normally:

1. ASpeed up cell division so that damaged cells are quickly replaced
2. BStop the cell cycle or trigger apoptosis when DNA is damaged
3. CMake cells immortal
4. DProduce growth factors