2127796
Description
Quiz by Georgia Knight, updated more than 1 year ago
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Created by Georgia Knight
almost 10 years ago
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Question 1
Question
DNA is the chemical that determines inherited characteristics and it contains vast amounts of information in the form of genetic code
Answer
- True
- False
Question 2
Question
What is the structure of a DNA molecule?
Answer
-
helical
-
double helix
-
pleated sheet
Question 3
Question
What three components is a nucleotide of DNA made up of?
Answer
-
a variable group
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a phosphate group
-
a deoxyribose sugar
-
an organic base (C, T, A or G)
-
a hydrocarbon
Question 4
Question
The single ring bases are?
Answer
-
C
-
G
-
A
-
T
Question 5
Question
The double ring bases are?
Answer
-
C
-
G
-
A
-
T
Question 6
Question
DNA is made up of two strands of polynucleotides. How do the nucleotides join to become polynucleotides?
Answer
-
Hydrogen bonds
-
Condensation Reaction between phosphate group of one nucleotide and deoxyribose of another.
-
Polar attraction
Question 7
Question
Which base does cytosine pair with?
Answer
-
adenine
-
thymine
-
guanine
Question 8
Question
What base does thymine pair with?
Answer
-
adenine?
-
guanine?
-
cytosine?
Question 9
Question
The organic bases form the structural backbone of DNA
Answer
- True
- False
Question 10
Question
What is the function of DNA?
Answer
-
To pass genetic information from cell to cell and generation to generation.
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To provide energy for the cell.
-
To make organic bases.
Question 11
Question
How is the DNA molecule adapted to carry out its functions? (4 points)
Answer
-
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.
-
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.
Question 12
Question
What is a gene?
Answer
-
A sequence of DNA bases that determines a polypeptide (a sequence of amino acids).
-
A molecule that contains all the genetic information of a cell.
-
A substance made up of DNA
Question 13
Question
What are introns?
Answer
-
Sections of DNA that don't code for amino acids.
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Amino acids.
-
Three bases that code for an amino acid.
Question 14
Question
The triplet code can be read in either direction of the DNA strand
Answer
- True
- False
Question 15
Question
The start of a sequence of the triplet code is always the same: the amino acid 'methionine'.
Answer
- True
- False
Question 16
Question
Stop codes are triplet codes that don't code for an amino acid, but the end of a polypeptide chain.
Answer
- True
- False
Question 17
Question
The triplet code is only specific to humans.
Answer
- True
- False
Question 18
Question
Prokaryotic cells don't have chromosomes as their DNA molecules are smaller and not associated with protein molecules
Answer
- True
- False
Question 19
Question
Chromosomes are visible all the time.
Answer
- True
- False
Question 20
Question
The DNA helix is wound around proteins to hold it in position.
Answer
- True
- False
Question 21
Question
A chromosome contains a single molecule of DNA.
Answer
- True
- False
Question 22
Question
How many chromosomes do humans have?
Answer
-
78
-
46
-
23
-
48
Question 23
Question
A homologous pair of chromosomes determine the same genetic characteristics.
Answer
- True
- False
Question 24
Question
What are different forms of a gene called?
Answer
-
alleles
-
chromosomes
-
haploid cells
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