Biological Molecules OCR AS - Nucleotides, DNA and RNA

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Quiz on Biological Molecules OCR AS - Nucleotides


 
  
Created May 6, 2010
by
froggie132

 

 
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1
What are the monomers of nucleic acids?
 
Nucleotides.
2
What are nucleotides made up of?
 
3 covenlently bonded subunits;
- one phosphate group
- one sugar molecule
- one organic...
3
What are nucleotides joined and split by?
 
Joined by condensation and split by hydrolysis. 
4
What are the two types of Purine?
 
Adenine and Guanine
5
What are the three types of pyrimidine?
 
Thymine, uracil and cytosine.
6
Which are larger; purines or pyrimidines?
 
Purines.
7
What is the name of the sugar molecule in the nucleotides of DNA?
 
Deoxyribose.
8
How do the nucleic acid strands run in relation to each other in DNA?
 
Antiparrallell.
9
What are the complementary base pairs in DNA?
 
Adenine and Thymine.
Guanine and Cytosine.
10
What are the main stages of DNA replication during interphase?
 
- double helix is untwisted.
- hydrogen bonds between the bases are broken to expose the...
11
What is the process of DNA replication also known as?
 
semi-conservative replication. 
12
What is the sugar molecule found in the nuceotides of RNA?
 
Ribose.
13
What nitrogenous bases are found in RNA and how do they pair?
 
Adenine - Uracil
Cytosine - Guanine
14
What are the three forms of RNA?
 
- Messenger
- Ribosomal
- Transfer
15
What do the sequences of bases on DNA mean?
 
They code for the sequence of amino acids in the assembally of a protein. 
16
What does RNA play a part in?
 
Protein synthesis.
17
What are the main stages of protein synthesis in relation to RNA?
 
- The sequence for a particular protein (gene) is exposed by the splitting the hydrogen bonds...
18
If a DNA template strand code reads ATTCGCGTTAAT, what will the mRNA strand read?
 
mRNA: UAAGCGCAAUUA

19
Why is mRNA less stable than DNA and why is this a neccessary feature of mRNA?
 
RNA is single-stranded and therefore less stable, as nucleotide bases are exposed and...

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