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