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STAAR EOC Biology Cell Reproduction — practice questions

Explore 25 free Cell Reproduction questions in STAAR EOC Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Cell Reproduction questions and exercises with answers

Showing questions 1–25 of 25.

How is the genome of a prokaryote arranged inside the cell?Read the answer and worked solution →How does antibiotic resistance often spread through a colony of bacteria?Read the answer and worked solution →A human somatic cell carries 46 chromosomes. How are those 46 made up?Read the answer and worked solution →Human gametes carry a single set of chromosomes. What is that condition called?Read the answer and worked solution →Wrapping DNA around cores of histone proteins is the first level of packing. How much does it shorten the molecule?Read the answer and worked solution →Nucleosomes and their linker DNA coil into a 30 nm fiber. How much shorter is the chromosome then?Read the answer and worked solution →The cell cycle splits into two major phases. What are they?Read the answer and worked solution →Which two structures are both duplicated during the S phase of interphase?Read the answer and worked solution →What is a cell doing during the G2 phase of interphase?Read the answer and worked solution →Which stage of mitosis follows immediately after prophase?Read the answer and worked solution →What job does the kinetochore do during prometaphase?Read the answer and worked solution →Where do the chromosomes line up during metaphase?Read the answer and worked solution →What has to break down before sister chromatids can separate in anaphase?Read the answer and worked solution →How does an animal cell pinch itself into two during cytokinesis?Read the answer and worked solution →A plant cell must build a new wall between its daughter cells. Where does the material come from?Read the answer and worked solution →A rapidly dividing human cell finishes its cycle in 24 hours. Which phase takes the least time?Read the answer and worked solution →A cyclin has bound its cyclin dependent kinase. What else must happen before the complex is fully active?Read the answer and worked solution →Retinoblastoma protein binds the transcription factor E2F. What does that binding stop?Read the answer and worked solution →A cell has DNA damage that its repair enzymes cannot fix. What can p53 do next?Read the answer and worked solution →Which step of eukaryotic cell division is absent from bacterial binary fission?Read the answer and worked solution →Which protein forms the ring that pinches a dividing bacterium in two?Read the answer and worked solution →How is bacterial DNA packaged compared with the DNA of a eukaryote?Read the answer and worked solution →Merge the cell count up to eightRead the answer and worked solution →Tap the five stages in orderRead the answer and worked solution →Flip to pair regulator with jobRead the answer and worked solution →

Worked practice questions

How is the genome of a prokaryote arranged inside the cell?

  1. As many linear double stranded molecules
  2. As one circular double stranded molecule
  3. As one linear single stranded molecule
  4. As many circular single stranded loops
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Correct answer: B. As one circular double stranded molecule

1. A genome is all of the DNA a cell carries. 2. In a prokaryote that DNA is one molecule, not several. 3. That single molecule is double stranded and closed into a loop or circle. 4. It sits in a region called the nucleoid rather than inside a nucleus. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.1 Cell Division_

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How does antibiotic resistance often spread through a colony of bacteria?

  1. By the exchange of ribosomes
  2. By the exchange of nucleoids
  3. By the exchange of histones
  4. By the exchange of plasmids
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Correct answer: D. By the exchange of plasmids

1. Plasmids are small loops of DNA separate from the main bacterial chromosome. 2. Bacteria can pass these plasmids to other bacteria. 3. A plasmid can carry a useful gene, such as one giving antibiotic resistance. 4. The receiving cell gains the trait without dividing, so resistance spreads through the colony. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.1 Cell Division_

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A human somatic cell carries 46 chromosomes. How are those 46 made up?

  1. 22 matched pairs plus two sex chromosomes
  2. 23 matched pairs and no sex chromosomes
  3. 46 matched pairs plus two sex chromosomes
  4. 11 matched pairs plus two sex chromosomes
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Correct answer: A. 22 matched pairs plus two sex chromosomes

1. The non sex chromosomes are the autosomes, and they come in matched pairs. 2. Humans have 22 such pairs, which is 44 chromosomes. 3. Adding the two sex chromosomes brings the total to 46. 4. Saying 23 matched pairs leaves out the fact that the sex chromosomes need not match. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.1 Cell Division_

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