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19 Cards in this Set
- Front
- Back
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What does DNA stand for?
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Deoxyribonucleic Acid
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What are the four nucleotides of DNA?
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1. Cytosine
2. Thymine 3. Adenine 4. Guanine |
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What types of bonds hold the two strands in a DNA molecule together?
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hydrogen bond
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What is the hydrogen bonding tule in DNA? Adenine hydrogen bonds together to _______ and Guanine hydrogen bonds to _____.
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Thyme
Cytosine |
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In DNA replication, each strand is used as a template to synthesize a new complementary strand. Each resulting DNA molecule is therefore half "old" and half "new". What word be describes this?
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Semiconservative
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What does RNA stand for?
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Ribonucleic Acid
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What are the four nucleotides in RNA?
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Adenine
Uracil Cytosine Guanine |
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What are the three classes of RNA molecules?
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1. Messenger RNA (mRNA)
2.Transfer RNA (tRNA) 3. Ribosomal RNA (rRNA) |
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What is the name for the cellular machinery, found in the cytoplasm, that synthesizes a protein using the information contained in a molecule of mRNA?
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Ribosome
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What type of molecule make up the backbone of DNA?
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sugar
phosphate |
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Are hydrogen bonds strong?
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No they are weak.
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What are the two (2) process that protein synthesis requires?
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1 Transcription
2. Translation |
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Where does transcription take place?
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Nucleus
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What happens during transcription?
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The mRNA is made complementary to one of the DNA strands.
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What happens during translation?
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tRNA brings amino acids to the ribosomes, and they join in the order prescribed by mRNA.
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What is the strand called that is being transcribed?
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sense strand
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What are 3 nucleotides called?
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codon
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Why is DNA called a triplet code?
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DNA is called a triplet code because every amino acid equals 3 nucleotides
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Why is DNA a negative charge?
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DNA has a negative charge because of the phosphate backbone.
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