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CGA Biology 2 - Nucleotides and Nucleic Acids Questions And Answers 100% Correct | Latest 2025
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CGA - Comprehensive Geriatric AssessmentCGA Biology 2 - Nucleotides and Nucleic Acids
Questions And Answers 100% Correct | Latest
2025
DNA - ANSWER double helix with base pairs
contains thymine and C G A
unreactive/stable
RNA - ANSWER single-stranded with a single nucleobase
contains uracil and C G A
reactive/unstable
Pyrimidines - ANSWER 1 carbon ring
cytosine, uracil, thymine
Purines - ANSWER 2 carbon rings
adenine, guanine
, CGA - Comprehensive Geriatric Assessment
Why does adenine bond with thymine and guanine with cytosine? - ANSWER
pyrimidine binds with purine so width of DNA strand is uniform all along
complementary base pairing due to ability of base to form 2 or 3 hydrogen bonds
Mononucleotide - ANSWER the three components are joined by condensation
reactions where two molecules of water are produced
bond between phosphate and C5 of sugar is called a phosphoester bond
Condensation of nucleotides - ANSWER phosphodiester bond
hydroxyl group of C3 and phosphate group of C5
mRNA (messenger) - ANSWER short single-strand copy of one gene
transcribed from DNA and carries message (code) from nucleus to ribosome
tRNA (transfer) - ANSWER single-strand folded into a cloverleaf shape exposing
anticodons and amino acid binding sites
held in place by hydrogen bonds
transfers amino acids to ribosome
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