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WorksheetsViruses and Immune System
Total questions: 25
Worksheet time: 15mins
White blood cells that kill bacteria by ENGULFING them
macrophages
memory cells
pathogens
helper T cells
Fever is helpful in fighting bacteria because
higher temperatures promote the activation of cellular proteins
lower temperatures promote the activation of cellular proteins
disease-causing bacteria do not grow well at high temperatures
disease-causing bacteria do not grow well at low temperatures
Which kind of white blood cell activates a specific immune response?
cytotoxic T cell
natural killer cells
helper T cells
B cells
Membranes lining the respiratory tract secrete a layer of _____ that traps pathogens before they can enter the lungs
B cells
oil
mucus
T cells
Helper T cells activate _______ and _______
memory cells, plasma cells
cytotoxic T cells, B cells
macrophages, B cells
antigens, antibodies
After an immune response, _______ circulate in the blood and protect the body from another infection by the same pathogen
cytotoxic T cells
memory cells
antibodies
antigens
Some cells of the immune system have surface receptor proteins that bind to specific
antibodies
antigens
pathogens
capsids
Bacteria often have small extra loops of DNA called
pili
nucleoids
prions
plasmids
The study of viruses is a part of biology because viruses
belong to the domain Archaea
are about to become extinct
are living organisms
are active inside living cells
Prions
always have a capsid
cause abnormal growth in plants
change the shape of normal proteins
are made of RNA
The body's first line of defense against infection includes all of the following except
skin
the lining of the digestive tract
the lining of the respiratory tract
white blood cells
Vaccines are produced from killed or weakened
phagocytes
pathogens
helper T cells
B cells
Vaccines are effective in preventing disease because they
interfere with the release of suppressor T cells
are antibodies directed against specific pathogens
contain specific B cells and T cells
lead to the formation of memory cells
Which of the following is a nonspecific defense against pathogens?
B cells
antibodies
helper T cells
fever
Bacteria cause disease by
forming endospores
transduction
forming toxins
bursting host cells
How is a lytic cycle different from a lysogenic cycle?
The host cell is destroyed in a lysogenic cycle
The host cell is destroyed in a lytic cycle
A provirus is formed during a lytic cycle
A lytic cycle release temperate viruses
The flu is caused by a virus.
How are bacteria cells different from the cells of eukaryotes?
Bacterias are prokaryotes
Their genetic material is not contained within the nuclei.
Eukaryotes have their genetic material in the nuclei
Their genetic material is contained within the nuclei.
Four ways that bacteria are helpful to people.
Provide oxygen, food products, environmental recycling, medicine.
Provide carbon dioxide, food products, environmental recycling, medicine.
Provide oxygen, waste products, environmental recycling, medicine.
Provide oxygen, food products, environmental recycling.
Tiny structures that produce proteins inside bacteria.
bacteria
cytoplasm
ribosomes
flagellum
A process by which bacteria reproduce asexually
binary fission
conjugation
endospore
pasteurization
