Cell Unit Test Review Keown Bio Question Preview (ID: 29595)
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Eukaryotes usually contain
a) A nucleus
b) Specialized organelles
c) Genetic material
d) All of the choices are true
Which of the following is a function of the nucleus?
a) Stores DNA
b) Controls most of the cell's processes
c) Contains all of the information needed to make proteins
d) All of the statements are correct.
Which of the following is NOT found in the nucleus?
a) Cytoplasm
b) Nucleolus
c) Chromosomes
d) DNA
A monosaccharide is a
a) carbohydrate
b) lipid
c) nucleic acid
d) protein
Which of the following is a true statement concerning viruses?
a) they can be cured with antibiotics
b) they are the smallest of all the cell types
c) infect only animals and humans
d) composed of a protein coat and nucleic acids inside.
The movement of molecules from an area of high concentration to an area of low concentration is known as ______. (14)
a) diffusion
b) dehydration reaction
c) active transport
d) hydrolysis
What is the MAIN function of a semi-permeable membrane?
a) to control materials entering and leaving the cell
b) to maintain a free flow of molecules
c) to keep the cell's shape
d) to regulate energy production in the cell
Which of the following statement about enzymes is NOT true?
a) enzymes work best at a specified pH
b) all enzymes work inside cells
c) enzymes are proteins
d) enzymes are organic catalysts.
What is the term used to describe the energy needed to get a reaction started?
a) adhesion energy
b) activation energy
c) cohesion energy
d) chemical energy
Which of the following contain a nucleus?
a) prokaryotes
b) bacteria
c) eukaryotes
d) organelles
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes:
a) water to enter the cell causing the cell to burst
b) water to leave the cell causing the cell to shrink
c) solutes to enter the cell causing the cell to burst
d) solutes to exit the cell causing it to shrivel
The cell membrane contains channels and pumps that help move materials from one side of the cell to the other. What are these channels and pumps made of?
a) proteins
b) carbohydrates
c) lipids
d) nucleic acids
What means of particle transport requires input of energy from the cell?
a) osmotic pressure
b) osmosis
c) facilitated diffusion
d) active transport
Choose the sentence below that is the best description of the function of phospholipids of a cell membrane.
a) they direct the production of proteins from DNA
b) they are responsible for assembling proteins
c) they are the main component that gives cell's their shape
d) they speed up chemical reactions
Which terms refers to cells having different job in an organism?
a) multicellular
b) cell specialization
c) levels of organization
d) unicellular
The cell theory applies to
a) bacteria
b) plants and animals
c) multicellular organisms
d) all of the choices are correct.
a substance with a pH of 6 is called
a) an acid
b) a base
c) both an acid and a base
d) neither an acid or a base
Which of the following is NOT found in the nucleus?
a) cytoplasm
b) nucleolus
c) chromosomes
d) DNA
Prokaryotes lack
a) cytoplasm
b) a cell membrane
c) a nucleus
d) genetic material
Carbohydrates made by joining MANY sugar molecules together
a) polysaccharide
b) monosaccharide
c) polypeptide chain
d) nucleic acids
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