Cell biology worksheet with answers

What does meiosis produce from one diploid cell?

1. AFour genetically different haploid cells
2. BTwo genetically identical diploid cells
3. CFour genetically identical haploid cells
4. DTwo genetically different diploid cells

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

1. ACell membrane
2. BMitochondria
3. CRibosomes
4. DCell wall

What is the main role of the nucleolus?

1. ACopying the whole genome
2. BStoring ATP for the nucleus
3. CMaking ribosomal RNA and assembling ribosome subunits
4. DBreaking down damaged proteins that are tagged with ubiquitin

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

1. AMitochondrial matrix
2. BIntermembrane space
3. CCytoplasm
4. DInner mitochondrial membrane

Which cell junction seals neighbouring epithelial cells together and stops fluid leaking between them?

1. AGap junction
2. BDesmosome
3. CHemidesmosome
4. DTight junction

What is crossing over during meiosis?

1. AExchange of genetic material between homologous chromosomes in prophase I
2. BFusion of two gametes
3. CCopying of DNA before division
4. DSeparation of sister chromatids as they move to opposite poles in anaphase II

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

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

Non-disjunction during meiosis can result in:

1. AMitochondrial DNA mutations only, which are passed on through the egg cytoplasm
2. BIdentical twins
3. CGametes with an abnormal number of chromosomes, such as in Down syndrome
4. DCrossing over