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AQA AS Biology 2.8 DNA
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Questions in this quiz (24)
1DNA is the chemical that determines inherited characteristics and it contains vast amounts of information in the form of genetic code
- ATrue
- BFalse
2What is the structure of a DNA molecule?
- Ahelical
- Bdouble helix
- Cpleated sheet
3What three components is a nucleotide of DNA made up of?
- Aa variable group
- Ba phosphate group
- Ca deoxyribose sugar
- Dan organic base (C, T, A or G)
- Ea hydrocarbon
4The single ring bases are?
- AC
- BG
- CA
- DT
5The double ring bases are?
- AC
- BG
- CA
- DT
6DNA is made up of two strands of polynucleotides. How do the nucleotides join to become polynucleotides?
- AHydrogen bonds
- BCondensation Reaction between phosphate group of one nucleotide and deoxyribose of another.
- CPolar attraction
7Which base does cytosine pair with?
- Aadenine
- Bthymine
- Cguanine
8What base does thymine pair with?
- Aadenine?
- Bguanine?
- Ccytosine?
9The organic bases form the structural backbone of DNA
- ATrue
- BFalse
10What is the function of DNA?
- ATo pass genetic information from cell to cell and generation to generation.
- BTo provide energy for the cell.
- CTo make organic bases.
11How is the DNA molecule adapted to carry out its functions? (4 points)
- AIt is very stable and can pass from generation to generation without changing.
- BIt is flexible so can be easily changed.
- CIt's two strands are only joined with H bonds which allow them to separate for DNA replication.
- DThe two strands are joined with H bonds that are strong and prevent the strands from separating.
- EThe molecule is extremely large so carries an immense amount of genetic information.
- FThe structural backbone protects the genetic information from corruption.
- GThe molecule is very small so lots of them can fit in a small space.
12What is a gene?
- AA sequence of DNA bases that determines a polypeptide (a sequence of amino acids).
- BA molecule that contains all the genetic information of a cell.
- CA substance made up of DNA
13What are introns?
- ASections of DNA that don't code for amino acids.
- BAmino acids.
- CThree bases that code for an amino acid.
14The triplet code can be read in either direction of the DNA strand
- ATrue
- BFalse
15The start of a sequence of the triplet code is always the same: the amino acid 'methionine'.
- ATrue
- BFalse
16Stop codes are triplet codes that don't code for an amino acid, but the end of a polypeptide chain.
- ATrue
- BFalse
17The triplet code is only specific to humans.
- ATrue
- BFalse
18Prokaryotic cells don't have chromosomes as their DNA molecules are smaller and not associated with protein molecules
- ATrue
- BFalse
19Chromosomes are visible all the time.
- ATrue
- BFalse
20The DNA helix is wound around proteins to hold it in position.
- ATrue
- BFalse
21A chromosome contains a single molecule of DNA.
- ATrue
- BFalse
22How many chromosomes do humans have?
- A78
- B46
- C23
- D48
23A homologous pair of chromosomes determine the same genetic characteristics.
- ATrue
- BFalse
24What are different forms of a gene called?
- Aalleles
- Bchromosomes
- Chaploid cells
Information
- Description
- A Levels A Levels (Biology) Quiz on AQA AS Biology 2.8 DNA, created by Georgia Knight on 25/02/2015.
- Author
- Georgia Knight
- Language
- English
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