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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

SNAB Differentiation & Variation – Check yourself

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SNAB Differentiation & Variation IAL Modular Biology check yourself quiz: free practice for IAL Edexcel Modular. Work through this SNAB Differentiation & Variation IAL Modular Biology check yourself quiz and get instant feedback on every answer. If you get stuck, review the 2.4 SNAB Differentiation & Variation — Notes — IAL Biology Notes lesson. More practice: IAL Edexcel Modular — all units. Syllabus: Pearson Edexcel International A Levels.

  • Questions count: 10
  • Passing grade: B+
  • Time limit: 10 minutes
Start Quiz
1.
Cells from the inner cell mass of a blastocyst are:
Totipotent
Pluripotent
Multipotent
Unipotent
2.
DNA methylation usually:
Increases transcription
Changes the base sequence
Silences genes
Causes mutation
3.
Which is an example of continuous variation?
Blood group
Height
Tongue rolling
Sex
4.
A major ethical issue with embryonic stem cells is:
Embryos are destroyed
They cannot divide
They are multipotent
They come from bone marrow
5.
Histone acetylation causes:
DNA to condense
Base sequence changes
Translation to stop
Chromatin to loosen and genes to be expressed
6.
Adult bone marrow stem cells are:
Totipotent
Pluripotent
Embryonic
Multipotent
7.
Which statement best describes Continuous variation?
Able to differentiate into almost any cell type but not extra-embryonic tissues.
Heritable changes in gene expression that do not alter the DNA base sequence.
Variation with a range of intermediate values, usually polygenic and environmentally influenced.
Able to differentiate into any cell type, including extra-embryonic cells such as placenta.
8.
Which statement best describes Polygenic?
Controlled by many genes at different loci.
Addition of acetyl groups to histones, loosening chromatin and increasing transcription.
Able to differentiate into a limited range of cell types, e.g. adult bone marrow cells.
Heritable changes in gene expression that do not alter the DNA base sequence.
9.
Which statement best describes Histone acetylation?
The process by which a cell becomes specialised through differential gene expression.
Addition of methyl groups to cytosine, usually silencing a gene.
Able to differentiate into a limited range of cell types, e.g. adult bone marrow cells.
Addition of acetyl groups to histones, loosening chromatin and increasing transcription.
10.
Which statement best describes Pluripotent?
An undifferentiated cell that can divide repeatedly and differentiate into specialised cell types.
The process by which a cell becomes specialised through differential gene expression.
Addition of methyl groups to cytosine, usually silencing a gene.
Able to differentiate into almost any cell type but not extra-embryonic tissues.
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Part of Topic 3 · Voice of the Genome — see every lesson and quiz in this unit.
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