Cell biology worksheet with answers

What does meiosis produce from one diploid cell?

1. ATwo genetically different diploid cells
2. BFour genetically different haploid cells
3. CTwo genetically identical diploid cells
4. DFour genetically identical haploid cells

Which statement is part of the cell theory?

1. AAll cells come from pre-existing cells
2. BAll cells can perform photosynthesis
3. CAll cells are the same size
4. DAll cells contain a nucleus

What is diffusion?

1. AMovement of water only across a membrane
2. BNet movement of particles from high to low concentration
3. CMovement of particles against their concentration gradient using ATP
4. DEngulfing of particles by the cell membrane

What does it mean that the genetic code is "degenerate" (redundant)?

1. ASome codons are never used
2. BThe code differs completely between species
3. CMost amino acids are coded by more than one codon
4. DEach codon codes for several amino acids

Active transport differs from facilitated diffusion because it:

1. ANeeds no proteins
2. BOnly moves water
3. CUses energy to move substances against their concentration gradient
4. DMoves substances down their gradient faster by using carrier proteins

A codon consists of:

1. AThree nucleotides on mRNA that code for an amino acid or a stop signal
2. BA whole gene
3. CThree amino acids
4. DOne nucleotide

Okazaki fragments are formed on:

1. AThe lagging strand during DNA replication
2. BmRNA during translation
3. CThe leading strand
4. DtRNA during transcription

Non-disjunction during meiosis can result in:

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