17.2. DNA
A subsection of Biology, 5090, through 17. Inheritance
Listing 10 of 16 questions
DNA carries genetic information in the form of genes. The paragraph below describes the structure of a DNA molecule. Complete the paragraph by writing the most appropriate word or letter in each space. DNA contains the chemical elements carbon, hydrogen, oxygen, and . Two strands of DNA coil together to form a double . Each strand is made up of a chain of . Bonds between pairs of bases hold the strands together. These bases always pair up in the same way: T with and with . Explain how genetic modification can be used to change the function of an enzyme so that it acts on a different substrate.
5090_s23_qp_22
THEORY
2023
Paper 2, Variant 2
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Complete Table 3.1, using terms from the list below to match each description to a term. phenotype dominant gene genotype heterozygous homozygous allele recessive Table 3.1 description term a form of a gene that codes for one of a pair of contrasting features a form of a gene that always has an effect when it is present having two different forms of a gene for a particular feature having two of the same form of a gene for a particular feature the combination of alleles that an organism has in its chromosomes is a diagram of part of a molecule of DNA taken from a bacterial cell. T T T T A A A A C C C C G G G G State the term which describes the shape of the DNA molecule. Most of the DNA in bacterial cells is found in one large loop in the cytoplasm. Name another structure in bacterial cells which contains DNA. State the name of the type of molecule that is represented by the letters A, T, G and C in . Outline the importance of the sequence of A, T, G and C in DNA.
5090_s24_qp_22
THEORY
2024
Paper 2, Variant 2
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Questions Discovered
16