iGCSE Biology 3b: DNA, genes and protein synthesis

What is the process of DNA replication?

• The process of transcribing DNA into RNA

• The process of making an identical copy of a DNA molecule

• The process of translating RNA into proteins

• The process of dividing a cell

What is a gene?

• A sequence of amino acids

• A section of DNA that codes for a protein

• A sequence of nucleotides

• A sequence of proteins

What is a chromosome?

• A sequence of amino acids

• A sequence of DNA

• A super-coiled strands of DNA

• A sequence of nucleotides

What is the shape of the DNA molecule?

• Linear

• Spherical

• Double helix

• Circular

RNA is:

• Double stranded, contains T

• Single stranded, contains T

• Double stranded, contains U

• Single stranded, contains U

How many chromosome pairs are there in a human somatic (body) cell nucleus?

• 46

• 92

• 23

• 12

What is a gamete?

• A sex cell

• A body cell

• A cell that cannot divide

• A cell that determines biological sex

What is the difference between a gene and an allele?

• Genes are larger than alleles

• Alleles are more complex than genes

• Genes contain multiple alleles

• Alleles are different versions of the same gene

How many chromosomes are present in a gamete nucleus?

• 46

• 92

• 23

• 12

What is the process of transcription?

• The process of making an identical copy of a DNA molecule

• The process of copying the genetic information from DNA to RNA

• The process of translating RNA into proteins

• The process of dividing a cell