A+ Depth chemistry paper H032_02 Solutions 2024
A+ Depth chemistry paper H032_02 Solutions 2024
A+ Depth chemistry paper H032_02 Solutions 2024
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Nucleotides and Nucleic acids (OCR)
Deoxyribonucleic Acid (DNA) - ANSWER-A double helix with two polynucleotide
chains held together by hydrogen bonds between specific complementary base
pairs that carries genetic information. The pentose sugar in DNA is deoxyribose.
Ribonucleic Acid (RNA) - ANSWER-Short, single stranded polynucleotide that
transfers genetic information from DNA to the ribosomes. Ribosomes are formed
from RNA and proteins. The pentose sugar in RNA is ribose
Nucleotides - ANSWER-The monomers that make up polynucleotides (DNA and
RNA). Formed from a pentose, a nitrogen-containing organic base and a
phosphate group.
Adenine - ANSWER-A nitrogen-containing base found in DNA and RNA that is
complementary to thymine
Cytosine - ANSWER-A nitrogen-containing base found in DNA and RNA that is
complementary to guanine
Guanine - ANSWER-A nitrogen-containing base found in DNA and RNA that is
complementary to cytosine
Thymine - ANSWER-A nitrogen-containing base found in DNA only that is
complementary to adenine
Uracil - ANSWER-A nitrogen-containing base found in RNA that is
complementary to adenine and takes the place of thymine in the complementary
RNA base sequence
Purines - ANSWER-Adenine and guanine. Have a double ring shape. Pair with
pyrimidines
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