AQA GCSE COMBINED BIOLOGY SCIENCE
MERGED QUESTION AND CORRECT
ANSWERS.
What do all cells have? - CORRECT ANSWER -Nucleus, Cytoplasm, Cell Membrane,
Mitochondria, Ribosomes
What do only plant and algal cells have? - CORRECT ANSWER -A Cellulose Cell Wall (sometimes
Chloroplasts and a Vacuole)
What do Eukaryotic Cells have? - CORRECT ANSWER -Cell Membrane, Cytoplasm, Genetic
Material enclosed in a nucleus,
What is a genome? - CORRECT ANSWER -The entire genetic material of an organism.
What is a gene? - CORRECT ANSWER -A small section of DNA on a chromosome. Each gene
codes for a particular sequence of amino acids to make a specific protein.
What is a homozygote? - CORRECT ANSWER -An individual with two identical alleles for a
characteristic.
What is a heterozygote? - CORRECT ANSWER -An individual with different alleles for a
characteristic.
What is a genotype? - CORRECT ANSWER -Describes the alleles present regarding a particular
characteristic.
, What is a phenotype? - CORRECT ANSWER -The physical appearance of an individual regarding a
particular characteristic.
What is a dominant/recessive allele? - CORRECT ANSWER -A dominant allele is always expressed
in the phenotype, even if only one is present in the pair.
A recessive allele is only expressed if two are present.
What are the sex chromosomes in a human female? - CORRECT ANSWER -XX
What are the sex chromosomes in a male female? - CORRECT ANSWER -XY
Is polydactyly dominant or recessive? - CORRECT ANSWER -Dominant - can be inherited from
either or both parents.
Is cystic fibrosis dominant or recessive? - CORRECT ANSWER -Recessive - must be inherited from
both.
What is the theory of evolution? - CORRECT ANSWER -All species have evolved from simple life
forms that first developed over 3 billion years ago.
What is genetic engineering? - CORRECT ANSWER -Genes transferred to the cells of animals and
plants at an early stage so they develop desired characteristics.
How does genetic engineering work? - CORRECT ANSWER -Genes from chromosomes of
humans and other organisms are cut out using enzymes and transferrred to cells of other
organisms using a vector (usually a bacterial plasmid or virus)
MERGED QUESTION AND CORRECT
ANSWERS.
What do all cells have? - CORRECT ANSWER -Nucleus, Cytoplasm, Cell Membrane,
Mitochondria, Ribosomes
What do only plant and algal cells have? - CORRECT ANSWER -A Cellulose Cell Wall (sometimes
Chloroplasts and a Vacuole)
What do Eukaryotic Cells have? - CORRECT ANSWER -Cell Membrane, Cytoplasm, Genetic
Material enclosed in a nucleus,
What is a genome? - CORRECT ANSWER -The entire genetic material of an organism.
What is a gene? - CORRECT ANSWER -A small section of DNA on a chromosome. Each gene
codes for a particular sequence of amino acids to make a specific protein.
What is a homozygote? - CORRECT ANSWER -An individual with two identical alleles for a
characteristic.
What is a heterozygote? - CORRECT ANSWER -An individual with different alleles for a
characteristic.
What is a genotype? - CORRECT ANSWER -Describes the alleles present regarding a particular
characteristic.
, What is a phenotype? - CORRECT ANSWER -The physical appearance of an individual regarding a
particular characteristic.
What is a dominant/recessive allele? - CORRECT ANSWER -A dominant allele is always expressed
in the phenotype, even if only one is present in the pair.
A recessive allele is only expressed if two are present.
What are the sex chromosomes in a human female? - CORRECT ANSWER -XX
What are the sex chromosomes in a male female? - CORRECT ANSWER -XY
Is polydactyly dominant or recessive? - CORRECT ANSWER -Dominant - can be inherited from
either or both parents.
Is cystic fibrosis dominant or recessive? - CORRECT ANSWER -Recessive - must be inherited from
both.
What is the theory of evolution? - CORRECT ANSWER -All species have evolved from simple life
forms that first developed over 3 billion years ago.
What is genetic engineering? - CORRECT ANSWER -Genes transferred to the cells of animals and
plants at an early stage so they develop desired characteristics.
How does genetic engineering work? - CORRECT ANSWER -Genes from chromosomes of
humans and other organisms are cut out using enzymes and transferrred to cells of other
organisms using a vector (usually a bacterial plasmid or virus)
