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6. Which 3 parts make up a nucleotide?
- Carbon, hydrogen and a nitrogenous base
- A sulphur group and a hexose
- A phosphate group, a pentose, and a nitrogenous base
- A phosphate group and a hexose
7. Which sugar is present in RNA
8. Which are pyrimidines?
- Guanine, thymine and cytosine
- Cytosine, thymine, uracil
- Adenine and guanine
- Cytosine and adenine
9. What is a phosphodiester bond?
- The linkage between the 3' carbon atom of one sugar molecule and the 5' carbon atom of another
- The linkage between the 3' carbon atom of one sugar molecule and the 6' of another
- The bond between two carboxyl groups
- The linkage between two nucleotides
10. How many forms does RNA have?
- 2, cRNA and tRNA
- 3, tRNA, rRNA and oRNA
- 3, mRNA, tRNA and rRNA
- 4, mRNA, tRNA and cRNA
11. Which are purines?
- Guanine, thymine and uracil
- Thymine and cytosine
- Adenine and guanine
- Adenine and cytosine
12. What is the function of a nitrogenous base?
- To bond nucleic acids together
- To bond nucleotides together
- To make up DNA
- To make up RNA
13. Which is a double strand of nucleotides?
14. Which is bigger, DNA or RNA?