Lesson 3.1.4
3.1.4 Prokaryotic cell ultrastructure Quiz: Pearson Edexcel Biology, Unit 3
20 questions
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Lesson 3.1.4, Prokaryotic cell ultrastructure: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 3: Voice of the Genome, written with Revision Ninja.
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The 20 questions
-
In which region of a bacterial cell is the main circular DNA located?
- Mitochondrion
- Nucleoid
- Nucleolus
- Plasmid
-
Which structure is a small circular piece of DNA found in bacteria?
- Mesosome
- Flagellum
- Pilus
- Plasmid
-
Which bacterial structure is used for movement?
- Flagellum
- Capsule
- Plasmid
- Pilus
-
Which surface structures allow bacteria to attach to surfaces and transfer genetic material?
- Flagella
- Mesosomes
- Ribosomes
- Pili
-
What is the main chemical component of bacterial cell walls?
- Lignin
- Peptidoglycan
- Cellulose
- Chitin
-
What is the outer protective slimy layer found on some bacterial cells called?
- Plasma membrane
- Cell wall
- Peptidoglycan
- Capsule
-
What is the typical diameter of a bacterial cell?
- About 1 nm
- About 0.5 to 2 um
- About 50 mm
- About 100 um
-
A bacterium 2 um long is viewed in an image at a magnification of x10,000. What is its length in the image?
- 200 mm
- 0.2 mm
- 20 mm
- 2 mm
-
Which cellular process is inhibited by an antibiotic targeting 70S ribosomes?
- Protein synthesis
- DNA replication
- ATP production
- Cell wall synthesis
-
What property of plasmids makes them useful vectors in genetic engineering?
- Histone packaging
- Independent replication
- Cell wall formation
- Enzyme secretion
-
What size of ribosome is found in prokaryotic cytoplasm?
- 60S
- 70S
- 50S
- 80S
-
What term describes inward foldings of the cell surface membrane in bacteria?
- Pili
- Plasmids
- Mesosomes
- Capsules
-
Why are peptidoglycan-targeting antibiotics completely ineffective against viruses?
- Viruses lack cells
- Viral DNA mutates
- Antibiotics cannot enter
- Enzymes destroy drugs
-
Which capability is lost in a bacterial mutant lacking flagella?
- DNA replication
- Cell wall synthesis
- Motility
- Protein synthesis
-
Which process do bacteria use to divide asexually into two identical cells?
- Meiosis
- Mitosis
- Budding
- Binary fission
-
In ribosome sedimentation rates, what does the unit S stand for?
- Solubility index
- Svedberg unit
- Subunit size
- Surface area
-
How does bacterial DNA differ structurally from eukaryotic nuclear DNA?
- Linear without histones
- Circular with histones
- Linear with histones
- Circular without histones
-
A bacterium has a capsule, a mesosome and a nucleoid. Which of these lies outside the plasma membrane?
- Nucleoid
- Mesosome
- Capsule
- Ribosome
-
Which structure controls the movement of substances into and out of a bacterial cell?
- The plasma membrane
- The plasmid
- The capsule
- The pilus
-
A spherical bacterium has a radius of 0.5 um. What is its surface area to volume ratio?
- 0.5 per um
- 3 per um
- 6 per um
- 12 per um
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