Which of the following combination of base pair is absent in DNA?
Correct answer: C. A-U
- A. A-T
- B. C-G
- C. A-U
- D. T-A
Explanation
In RNA, the two pyrimidine bases are uracil and cytosine. While in DNA, the pyrimidine bases are thymine and cytosine. Thus, uracil is absent in DNA and is replace by thymine.
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Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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