Cell Biology Quiz

Question 1A culture begins with 3 cells. Each cell divides into two at each of four complete rounds, with no deaths. Find the final cell count as a whole number.

Enter a number.

Answers within 0.5 of the expected value are accepted.

Question 2A plant cell performs photosynthesis during the day. What describes its relation to respiration?

Photosynthesis replaces respiration throughout the plant’s lifeRespiration occurs in animal cells rather than in plant cellsRespiration continues in the light as well as in darknessRespiration starts only when photosynthesis has stopped

Question 3During the cell cycle, when is DNA copied relative to chromosome separation in mitosis?

After mitosis, once each daughter cell has inherited half the genesDuring separation, after chromosomes reach opposite endsAt cytokinesis, as the membrane supplies replacement chromosomesBefore mitosis, during interphase preparation

Question 4At the cell surface, a membrane admits certain molecules while restricting others. Which feature explains its role?

A rigid wall with identical openings for dissolved substancesA selective barrier with proteins that regulate passageA barrier that admits molecules according to size aloneA surface that requires bulk mixing with the surroundings

Question 5During the cell cycle, a cell with damaged DNA is delayed before division. What is the purpose of this regulation?

Coordinate progression with checks on readiness and damageStop the cell from carrying out further chemical reactionsMake a damaged cell complete its divisions at a faster rateReplace the damaged chromosomes with an unrelated organism’s DNA

Question 6A student says mitochondria create energy from nothing. Which account corrects the claim?

They replace the cell’s need for chemical reactionsThey store genes instead of participating in energy conversionThey transform energy from molecules into forms cells useThey provide the site of every reaction that makes cellular ATP

Question 7A laboratory compares a bacterium with a typical animal cell. Which structure distinguishes the animal cell?

A supply of DNA as its hereditary materialA cell membrane surrounding the cytoplasmA cytoplasm containing dissolved substances for metabolismA nucleus enclosed by a membrane inside the cell

Question 8Inside a bacterial cell, amino acids are joined according to genetic messages. Which structure performs that synthesis?

Mitochondria enclosing the bacterial chromosomesThe cell wall assembling amino acids into proteinsThe DNA molecule joining amino acids without translationRibosomes using the cell’s genetic messages

Question 9Two cells in the same animal have different specialized functions. What chiefly explains their different proteins?

Different patterns of gene expressionA different complete genome created for each tissue during developmentA complete replacement of DNA with proteins in the specialized cellThe same genes being used at identical rates in both cells

Question 10Gametes carry half the usual chromosome sets. Which process produces that reduction?

Mitosis producing daughter cells with fewer chromosome setsMeiosis reducing the chromosome sets in its first divisionCytokinesis without separation of the genetic materialCell growth reducing chromosome sets as cell size increases

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Cell Biology Quiz

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