2127796
Beschreibung
Quiz von Georgia Knight, aktualisiert more than 1 year ago
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Erstellt von Georgia Knight
vor fast 10 Jahre
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Frage 1
Frage
DNA is the chemical that determines inherited characteristics and it contains vast amounts of information in the form of genetic code
Antworten
- True
- False
Frage 2
Frage
What is the structure of a DNA molecule?
Antworten
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helical
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double helix
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pleated sheet
Frage 3
Frage
What three components is a nucleotide of DNA made up of?
Antworten
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a variable group
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a phosphate group
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a deoxyribose sugar
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an organic base (C, T, A or G)
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a hydrocarbon
Frage 4
Frage
The single ring bases are?
Antworten
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C
-
G
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A
-
T
Frage 5
Frage
The double ring bases are?
Antworten
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C
-
G
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A
-
T
Frage 6
Frage
DNA is made up of two strands of polynucleotides. How do the nucleotides join to become polynucleotides?
Antworten
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Hydrogen bonds
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Condensation Reaction between phosphate group of one nucleotide and deoxyribose of another.
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Polar attraction
Frage 7
Frage
Which base does cytosine pair with?
Antworten
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adenine
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thymine
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guanine
Frage 8
Frage
What base does thymine pair with?
Antworten
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adenine?
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guanine?
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cytosine?
Frage 9
Frage
The organic bases form the structural backbone of DNA
Antworten
- True
- False
Frage 10
Frage
What is the function of DNA?
Antworten
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To pass genetic information from cell to cell and generation to generation.
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To provide energy for the cell.
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To make organic bases.
Frage 11
Frage
How is the DNA molecule adapted to carry out its functions? (4 points)
Antworten
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It is very stable and can pass from generation to generation without changing.
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It is flexible so can be easily changed.
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It's two strands are only joined with H bonds which allow them to separate for DNA replication.
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The two strands are joined with H bonds that are strong and prevent the strands from separating.
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The molecule is extremely large so carries an immense amount of genetic information.
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The structural backbone protects the genetic information from corruption.
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The molecule is very small so lots of them can fit in a small space.
Frage 12
Frage
What is a gene?
Antworten
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A sequence of DNA bases that determines a polypeptide (a sequence of amino acids).
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A molecule that contains all the genetic information of a cell.
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A substance made up of DNA
Frage 13
Frage
What are introns?
Antworten
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Sections of DNA that don't code for amino acids.
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Amino acids.
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Three bases that code for an amino acid.
Frage 14
Frage
The triplet code can be read in either direction of the DNA strand
Antworten
- True
- False
Frage 15
Frage
The start of a sequence of the triplet code is always the same: the amino acid 'methionine'.
Antworten
- True
- False
Frage 16
Frage
Stop codes are triplet codes that don't code for an amino acid, but the end of a polypeptide chain.
Antworten
- True
- False
Frage 17
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The triplet code is only specific to humans.
Antworten
- True
- False
Frage 18
Frage
Prokaryotic cells don't have chromosomes as their DNA molecules are smaller and not associated with protein molecules
Antworten
- True
- False
Frage 19
Antworten
- True
- False
Frage 20
Frage
The DNA helix is wound around proteins to hold it in position.
Antworten
- True
- False
Frage 21
Frage
A chromosome contains a single molecule of DNA.
Antworten
- True
- False
Frage 22
Frage
How many chromosomes do humans have?
Antworten
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78
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46
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23
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48
Frage 23
Frage
A homologous pair of chromosomes determine the same genetic characteristics.
Antworten
- True
- False
Frage 24
Frage
What are different forms of a gene called?
Antworten
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alleles
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chromosomes
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haploid cells
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