Cells Revision for GCSE Science

What shape does DNA typically take?

• Triple helix

• Double helix

• Single strand

• Circular loop

What is the primary function of genes within DNA?

• Create cell membranes

• Produce enzymes

• Build proteins

• Provide energy

What is the role of amino acids in cells?

• They help in digestion

• They build proteins

• They generate energy

• They form the cell wall

What is the result of mitosis in terms of cell genetics?

• Cells with different DNA

• Cells with half the original DNA

• Cells with identical DNA

• Cells with mutated DNA

Which type of reproduction results in genetically identical offspring?

• Sexual reproduction

• Asexual reproduction

• Mitotic reproduction

• Meiotic reproduction

How many pairs of chromosomes are typical in human cells?

• 23 pairs

• 92 pairs

• 12 pairs

• 46 pairs

What is the main advantage of sexual reproduction?

• Faster reproduction

• Less energy consumption

• Genetic variation

• Simpler process

What is the outcome when DNA sections are swapped during meiosis?

• Decreased genetic variation

• Increased genetic variation

• Unchanged genetic structure

• Complete DNA replication

During meiosis, what happens to the chromosome pairs?

• They disappear

• They remain intact

• They duplicate

• They split

What is the final product of meiosis?

• Two identical cells

• Four different cells

• Multiple mixed cells

• One parent cell