1.Easy
What is the main material in the cell walls of fungi?
- APeptidoglycan
- BCollagen
- CCellulose
- DChitin
2.Easy
What is a tissue?
- ASeveral organs that work together
- BA structure inside a cell
- CA single cell that has one special job in the body
- DA group of similar cells that work together
3.Easy
Which molecules, made by immune cells, bind to specific antigens?
- AHormones
- BEnzymes
- CPhospholipids
- DAntibodies
4.Medium
Why can an electron microscope show more detail than a light microscope?
- AElectrons have a much shorter wavelength than light
- BElectron microscopes use stronger glass lenses
- CElectron microscopes use living cells only
- DElectrons are brighter than light
5.Medium
Which is the correct way to write the scientific name of the gut bacterium?
- AEscherichia Coli
- BEscherichia coli
- Ccoli Escherichia
- DEscherichia Coli
6.Medium
Which statement about Archaea is correct?
- AThey are multicellular plants
- BThey are prokaryotes, and many live in extreme environments
- CThey are eukaryotes that have a nucleus and membrane-bound organelles
- DThey are a type of virus
7.Hard
How does a phospholipid differ from a triglyceride?
- AOne of the fatty acids is replaced by a phosphate group
- BIt is made of amino acids
- CIt contains no glycerol, only fatty acids and phosphate
- DIt has four fatty acids instead of three
8.Hard
A person's body temperature starts to fall in a cold room. Which responses help bring it back up?
- AFaster breathing and more urine production
- BSweating and widening of blood vessels in the skin
- CSlower heart rate and less muscle activity
- DShivering and narrowing of blood vessels in the skin
Answer key
- 1. D · Chitin
- 2. D · A group of similar cells that work together
- 3. D · Antibodies
- 4. A · Electrons have a much shorter wavelength than light
- 5. B · Escherichia coli
- 6. B · They are prokaryotes, and many live in extreme environments
- 7. A · One of the fatty acids is replaced by a phosphate group
- 8. D · Shivering and narrowing of blood vessels in the skin
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