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| 4120368280 | 1.a. Describe three main differences between RNA and DNA | RNA contains the sugar ribose instead of deoxyribose, is generally single-stranded rather than double-stranded, and contains uracil instead of thymine. | 0 | |
| 4120372462 | b. List the three main types of RNA, and explain what they do. | Messenger RNA carries instructions for polypeptide synthesis from DNA in the nucleus to ribosomes in the cytoplasm. Ribosomal RNA forms an important part of both subunits of a ribosome, where proteins are assembled. transfer RNA carries amino acids to a ribosome and matches them to the coded mRNA message. | 1 | |
| 4120376076 | c. Why is it important for a single gene to be able to produce hundreds of thousands of the same RNA molecules? | Proteins must be continuously synthesized in the cell, so the instructions coded in genes must be used over and over again. Therefore, a single gene must be able to produce hundreds or thousands of the same RNA molecules for protein synthesis. | 2 | |
| 4120377479 | 2. a. Describe what happens during transcription | During transcription, the enzyme | 3 | |
| 4120381860 | b. What do you think would happen if introns were not removed from pre-mRNA? | 4 | ||
| 4120393143 | 3. An RNA molecule is looking for a job in a protein synthesis factory. It asks you to write its resume. This RNA molecule is not yet specialized and could, with some structural changes, function as mRNA, rRNA, or tRNA. Write a resume for this molecule that reflects the capabilities of RNA. | 5 |
