Nucleotides And Nucleic Acids

Question 1

Draw the structure of a nucleotide

Question 2

What are three parts of a nucleotide

Answer 2

Pentose sugar
Nitrogenous base
Phosphate group

Question 3

What are nucleotides used to make

Answer 3

DNA and rna
Dna-used to store genetic info
Rna-used to make proteins from the instructions of dna

Question 4

What’s the Pentose sugar in dna and rna

Answer 4

Dna-deoxyribose
Rna-ribose

Question 5

In a dna nucleotide what could the bases be and in a rna nucleotide what could the bases be

Answer 5

Adenine,thymine,guanine,cytosine
Adenine,uracil,guanine,cytosine

Question 6

How many polynucleotide chains do rna and dna have

Answer 6

Dna has a two polynucleotide chains
Rna has single polynucleotide chain

Question 7

Explain how polynucleotide strands are formed and broken down

Answer 7

Condensation reactions between nucleotides form string phosphodiester bonds ( sugar phosphate backbone). Hydrolysis reactions use a molecule of water to break these bonds
Enzymes catalyse these reactions

Question 8

What’s the purine bases and describe their structure

Answer 8

Adenine c5h5n5
Guanine c5h5n5O
Two carbon nitrogen rings joined together

Question 9

What’s the Pyramidine bases and describe their structure

Answer 9

Thymine
Cytosine
Uracil
One carbon nitrogen ring
Pyramidine smaler than a purine base