OCR GCSE Combined Science
Topic questions Genetics and inheritance DNA structure
7 questions · 24 marks · about 30 minutes
Which statement describes the structure of DNA?
A A monomer made of one strand
B A monomer made of two strands
C A polymer made of one strand
D A polymer made of two strands
The model represents a molecule found inside human cells.
Which of these describes this model?
A Monomer and a double helix
B Monomer and a double twist
C Polymer and a double helix
D Polymer and a double twist
Which two terms describe the structure of DNA?
A Monomer and double helix
B Monomer and triple helix
C Polymer and double helix
D Polymer and triple helix
The model represents a polymer found inside human cells.
What is the name of this polymer?
A ATP
B Carbohydrate
C DNA
D Protein
12* (a) Look at the diagram, it shows how humans, Homo sapien s, evolved.
It also shows that humans are closely related to other apes, like chimpanzees.
Describe how humans, Homo sapiens, evolved from Australopithecus afarensis and the evidence for this shown in the diagram.
Describe how the use of DNA in phylogenetics has changed classification systems.
How does the structure of DNA support its use in phylogenetics?
The diagram shows a cell during one stage of mitosis.
Describe two things that happen to the chromosomes in the next stage of mitosis.
Chromosomes are made of DNA.
Describe the structure of DNA.
After mitosis, cell differentiation takes place.
What is meant by the term cell differentiation ?
The diagram shows a cell during one stage of mitosis.
Describe two things that happen to the chromosomes in the next stage of mitosis.
Chromosomes are made of DNA.
Describe the structure of DNA.
After mitosis, cell differentiation takes place.
What is meant by the term cell differentiation ?
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Combined Science starter pack