Microbiology quiz3 Word Scramble
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Question | Answer |
transcription | The process by which RNA is made from a DNA template. It does not require a primer:template junction. |
pyrimidines | thymine and cytosine |
purines | adenine and guanine |
What are the three different forms of RNA? | Messenger RNA (mRNA) – contains information derived from DNA Transfer RNA (tRNA) – carries amino acids to ribosomes Ribosomal RNA (rRNA) – helps maintain the proper shape of ribosomes. |
Describe the basic structure of DNA | helical the two strands are complementary and wind around each other bases are purines and pyrimidines It is composed of nucleotides a phosphate, deoxyribose, and a nucleotide base. The strands are anti-parallel 5 to 3 the other 3 to 5 |
What nucleotide based pair with each other in DNA? | adenine pairs with thymine Cytosine pairs with quanine |
gene | A gene is a segment of DNA that codes for a functional product (for example, a protein). |
Why is the genetic code said to be degenerate? | some codons code for the same amino acid, and we say that the genetic code is degenerate (or it is redundant). |
Where does DNA replication start? | A portion of the DNA is paired with a short piece of RNA called a primer to start replication. |
What is a coden | There are 64 codons and 20 amino acids. Therefore, |
Describe the basic structure of RNA. How does it differ from DNA? | It contains the sugar ribose (rather than deoxyribose). It contains uracil instead of thymine. Uracil pairs up with adenine. It is usually found in single-stranded form. |
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janice1
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