Cell biology worksheet with answers

Which part of the cytoskeleton forms the mitotic spindle?

1. ACollagen fibres
2. BMicrotubules
3. CIntermediate filaments
4. DActin filaments

What is a gene?

1. AA protein that copies DNA
2. BA whole chromosome
3. CA single nucleotide
4. DA DNA sequence that codes for a protein or functional RNA

What is the final electron acceptor in aerobic respiration?

1. AOxygen
2. BNAD⁺
3. CGlucose
4. DCarbon dioxide

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

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

Which molecules can cross a phospholipid bilayer most easily by simple diffusion?

1. ALarge polar molecules such as glucose
2. BIons such as Na⁺ and K⁺
3. CSmall non-polar molecules such as O₂ and CO₂
4. DProteins such as albumin

Apoptosis is:

1. AProgrammed cell death
2. BCell fusion
3. CUncontrolled cell division
4. DCell growth

A plant cell placed in a concentrated salt solution loses water and its membrane pulls away from the cell wall. What is this called?

1. ACytolysis
2. BPlasmolysis
3. CHaemolysis
4. DTurgor

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

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