AQ GCSE BIOLOGY: INFECTION AND RESPONSE WITH
COMPLETE SOLUTIONS VERIFIED
What is health?
A state of complete physical, mental, and social well-being
What is risk?
Uncertainty concerning the occurrence of a loss
What is a risk factor?
Any attribute, characteristic or exposure of an individual that increases the likelihood
of developing a disease or injury
What is a non-communicable disease?
A disease that cannot be passed from person to person. It is hereditary or develops
throughout your life
What is a communicable disease?
A disease that can be transmitted person to person, animal to person and insect to
person
What is a benign tumor?
A mass of cells that grows out of control but remains at the site of origin
What is a malignant tumor?
A mass of cancer cells that can spread.
It grows rapidly and spreads to other tissues.
How are pathogens spread?
Water, air and direct contact
What are the different pathogens?
Virus, bacterium, protist, fungi
, How can pathogens be prevented?
Isolation, destroying vectors, hygiene
What are the characteristics of bacteria?
Prokaryotic
Reproduce by binary fission
DNA in cytoplasm
Cell membrane and cell wall
Approx. 100x larger than viral particle
Unicellular
What are the characteristics of viruses?
Not living
Replicate organism and invade host cell
Genetic material contained in a protein coat
No cell membrane, capsid surround genetic material
Approx. 100x smaller than a bacterium
Particles
What are the characteristics of Fungi?
Eukaryotic
Reproduce asexually: Budding or sexually: spores
DNA in true nucleus
Cell membrane and cell wall made from chitin
Vary in size: single celled to large multicellular organisms
Unicellular or multicellular
What are the characteristics of protists?
COMPLETE SOLUTIONS VERIFIED
What is health?
A state of complete physical, mental, and social well-being
What is risk?
Uncertainty concerning the occurrence of a loss
What is a risk factor?
Any attribute, characteristic or exposure of an individual that increases the likelihood
of developing a disease or injury
What is a non-communicable disease?
A disease that cannot be passed from person to person. It is hereditary or develops
throughout your life
What is a communicable disease?
A disease that can be transmitted person to person, animal to person and insect to
person
What is a benign tumor?
A mass of cells that grows out of control but remains at the site of origin
What is a malignant tumor?
A mass of cancer cells that can spread.
It grows rapidly and spreads to other tissues.
How are pathogens spread?
Water, air and direct contact
What are the different pathogens?
Virus, bacterium, protist, fungi
, How can pathogens be prevented?
Isolation, destroying vectors, hygiene
What are the characteristics of bacteria?
Prokaryotic
Reproduce by binary fission
DNA in cytoplasm
Cell membrane and cell wall
Approx. 100x larger than viral particle
Unicellular
What are the characteristics of viruses?
Not living
Replicate organism and invade host cell
Genetic material contained in a protein coat
No cell membrane, capsid surround genetic material
Approx. 100x smaller than a bacterium
Particles
What are the characteristics of Fungi?
Eukaryotic
Reproduce asexually: Budding or sexually: spores
DNA in true nucleus
Cell membrane and cell wall made from chitin
Vary in size: single celled to large multicellular organisms
Unicellular or multicellular
What are the characteristics of protists?
