1. The diagram represents the structure of a section of DNA - Scottish Highers Human Biology - Question 1 - 2023
Question 1
1. The diagram represents the structure of a section of DNA.
(a)
(i) Name the repeating units that make up DNA.
_______________________________
(ii) Name the par... show full transcript
Worked Solution & Example Answer:1. The diagram represents the structure of a section of DNA - Scottish Highers Human Biology - Question 1 - 2023
Step 1
Name the repeating units that make up DNA.
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Answer
The repeating units that make up DNA are called DNA nucleotides.
Step 2
Name the parts of these units, joined by strong bonds, that make up the backbone of DNA.
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Answer
The parts of these units are sugar (deoxyribose) and phosphate.
Step 3
Identify one letter from the diagram that labels the 3' end of a DNA strand.
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Answer
The letter that labels the 3' end of a DNA strand is either X or Y.
Step 4
Name this stage.
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Answer
This stage is called transcription.
Step 5
Describe how alternative RNA splicing can produce different proteins from one gene.
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Answer
Alternative RNA splicing can produce different proteins from one gene by retaining or removing different exons during the splicing process, resulting in diverse combinations of exons in the final mRNA.
Step 6
Describe the function of tRNA in protein synthesis.
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Answer
tRNA attaches to a specific amino acid and transports this amino acid to the ribosome during translation. The anticodon on tRNA aligns with the corresponding codon on mRNA, ensuring the correct amino acid is added to the growing polypeptide chain.
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