Click on the links below to find the answer to each of these questions.
- State three differences between DNA and RNA. [answer]
- If a coding strand of DNA is 18- nucleotides, how many amino acids will
be in the polypeptide that is formed? [answer]
How many nucleotides will be in the mRNA? [answer]
How many
anticodons will there be? [answer]
- Describe the function of tRNA. [answer]
Use the m-RNA codes and the sequence of the polypeptide shown
below to answer the next two questions. Remember, the codes below are mRNA codes, not DNA
codes.
| AAG - lysine |
GAA - glutamic acid |
| ACU - threonine |
GGC - glycine |
| AGU - serine |
GUA - valine |
| CAU - histidine |
UAA - tyrosine |
| CCG - proline |
UGA - tryptophan |
| CUU - leucine |
UUC - phenylalanine |
polypeptide: proline-tyrosine-histidine-valine-glutamic acid
- What is the base sequence of the mRNA that codes for the polypeptide
listed above? [help
with the answer]
- What is the base sequence of the coding strand of DNA that was necessary
for the production of the polypeptide? [help
with the answer]
- What is the difference between primary mRNA and mature mRNA? [answer]
- What word refers to a part of mRNA that must be removed before mature mRNA is produced?
[answer]
- What is the function of mRNA? [answer]
- What is the function of ribosomal RNA? [answer]
- What is a codon? [answer]
- What is transcription? [answer]
Describe the process. [answer]
- Define translation. Describe the process. [answer]
- What is meant by the term "genetic code"? [answer]
- What is a point mutation? [answer]
- What is a frameshift mutation? [answer]
- Which of the two mutation types (point or frameshift) are the most
serious? Why? [answer]