Unit 1 Biology (Edexcel IAL): Nucleic acids Exam Questions with 100% Correct Answers

Unit 1 Biology (Edexcel IAL): Nucleic

acids Exam Questions with 100%

Correct Answers


What are nucleotides? - ✔✔Molecules that carry the information needed to

form new cells

What is DNA? - ✔✔Deoxyribonucleic acid

Where is DNA found? - ✔✔In chromosomes of the nucleus of cells

What is the structure of DNA? - ✔✔Polymers consisting of nucleotide

monomers



Nucleotide consists of:

- Pentose sugar (deoxyribose)

- Phosphate group (phosphoric acid)

- Nitrogenous base

What is RNA? - ✔✔Ribonucleic acid




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, What is the structure of RNA? - ✔✔Polymers consisting of nucleotide

monomers



Nucleotide consists of:

- Pentose sugar (ribose)

- Phosphate group (phosphoric acid)

- Nitrogenous base

What is the difference between deoxyribose and ribose? - ✔✔Deoxyribose

contains 1 less oxygen atom

What are the purine bases? - ✔✔Bases with 2 nitrogen containing rings:

adenine and guanine

What are the pyrimidine bases? - ✔✔Bases with 1 nitrogen containing ring:

cytosine, thymine, and uracil

What are the base pairings in DNA? - ✔✔A - T

G-C

What are the base pairings in RNA? - ✔✔A - U

G-C

What forms the backbone of DNA and RNA? - ✔✔Pentose sugar and

phosphate group

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