CAIE A-Level Biology AS 6.1.1 Nucleotide Structure Questions
Describe nucleotide structure and how nucleotides form nucleic acids, using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Describe the structure of nucleotides and explain how they form nucleic acids.
CAIE A-Level Biology AS 6.1.1 Nucleotide Structure Questions question 1
In most plants, sucrose is the main sugar that is transported from sources to sinks.
Fig. 5.1 shows part of one pathway that is used in plant cells to synthesise sucrose. The enzyme sucrose synthase catalyses the transfer of glucose from UDPG (uridine diphosphate glucose) to fructose.
Fig. 5.1
The structure of UDPG is shown in Fig. 5.2.
Fig. 5.2
Explain why UDP can be described as a phosphorylated nucleotide.
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