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Course: Edexcel A Level Biology A (SNAB) 9BI0
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Edexcel A Level Biology A (SNAB) 9BI0

Topic 1 · Lifestyle, Health and Risk

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Topic 2 · Genes and Health

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Topic 3 · Voice of the Genome

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Topic 4 · Biodiversity and Natural Resources

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Topic 5 · On the Wild Side

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Topic 6 · Immunity, Infection and Forensics

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Topic 7 · Run for your Life

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Topic 8 · Grey Matter

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Quiz

6.2.7 Post-transcriptional Modification – Unit exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
IGCSE Biology 15.2 Antibiotic resistance - Question 6
IGCSE Biology 15.2 Antibiotic resistance - Question 6
A
B
C
D
2.
IGCSE Biology 15.2 Antibiotic resistance - Question 9
IGCSE Biology 15.2 Antibiotic resistance - Question 9
A
B
C
D
3.

Which practice reduces the spread of antibiotic resistance?

Using antibiotics for viral infections
Completing the prescribed course of antibiotics
Using antibiotics routinely in animal feed
Stopping when symptoms improve
4.
A student explained why a plant stem bends toward a window as follows. Step 1: Light falls on one side of the stem. Step 2: Auxin moves to the lit side of the stem. Step 3: Cells on the side with more auxin elongate more. Step 4: The stem bends toward the light source. Which step is wrong?
Step 1
Step 2
Step 3
Step 4
5.
Which practice most reduces the spread of antibiotic resistance?
Using antibiotics for colds
Stopping a course when feeling better
Adding antibiotics to animal feed
Prescribing antibiotics only when needed
6.
In negative feedback, the response produced by the system
has no effect on the stimulus
amplifies the original change
permanently resets the stimulus
opposes the original change and restores the set point
7.
Which statement best describes Antibiotic?
Protection of unvaccinated individuals when a high proportion of a population is immune, limiting transmission.
A lymphocyte that kills infected body cells, e.g. using perforin to make pores in their membranes.
A lymphocyte that is activated by an APC and releases cytokines to activate B cells, cytotoxic T cells and macrophages.
A substance, often produced by microorganisms, that kills or inhibits the growth of bacteria.
8.
A drug blocks the enzyme that breaks down a second messenger. The immediate effect inside the target cell is that the response
is unchanged
becomes weaker
stops at once
lasts longer than normal
9.
Using the table, how many bacteria are present after 120 minutes?
12
64
32
128
10.
Bacteria reproduce by _____.
the lytic cycle
binary fission
mitosis
meiosis
11.
Antibiotics are effective against viruses. True or false?
True
True for colds
True for flu
False
12.
Gut bacteria help digestion and make vitamin K. True or false?
False
True
False, they cause disease only
True only in infants
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Part of Topic 6 · Immunity, Infection and Forensics — see every lesson and quiz in this unit.
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