Cell Biology
Which of these do all prokaryotes and eukaryotes share?
a. nuclear envelope
b. cell walls
c. plasma membrane
d. organelles
Plasma membrane
The tails of the phospholipids of the plasma membrane are composed of ______ and are _____.
a. phosphate groups; hydrophilic
b. fatty acid groups; hydrophobic
c. phosphate groups; hydrophobic
d. fatty acid groups; hydrophilic
fatty acid group; hydrophobic
Central Vacuole, Chloroplast and Cell wall are parts of a(n) ________________.
a. animal cell
b. plant cell
Plant cell
Which of the following is not an example of an energy transformation?
a. Solar panels at work
b. Heating up dinner in a microwave
c. Formation of static electricity
d. None of the above
None of the above
Chemiosmosis involves _________.
a. the movement of hydrogen ions across a mitochondrial membrane
b. the movement of electrons across the cell membrane
c. the movement of hydrogen atoms across a mitochondrial membrane
the movement of hydrogen ions across a mitochondrial membrane
A typical prokaryotic cell _________ compared to a eukaryotic cell.
a. is similar in size
b. is smaller in size by a factor of 10
c. is smaller in size by a factor of 100
is smaller in size by a factor of 100
Water moves via osmosis _________.
a. from an area with a low concentration of solutes to an area with a higher one
b. from a area with a low concentration of water to one of higher concentration
c. from an area with a high concentration of other solutes to a lower one.
from an area with low concentration of solutes to an area with a higher one
True of False
Flagella and Cilia are structures of motility in eukaryotic cells
True
Which of the following is NOT true about enzymes?
a. They are usually made of amino acids
b. They are consumed by the reactions they catalyze.
c. They lower the activation energy of chemical reactions.
They are consumed by the reactions they catalyze.
Which of the following fermentation methods can occur in animal skeletal muscles?
a. alcohol fermentation
b. lactic acid fermentation
c. propionic fermentation
lactic acid fermentation
Which of the following is found both in eukaryotic and prokaryotic cells?
a. nucleus
b. vacuole
c. ribosome
d. mitochondrion
Ribosome
The principal force driving movement in diffusion is __________.
a. particle size
b. temperature
c. membrane surface area
d. concentration gradient
concentration gradient
ATP production and cellular respiration happen in the _____________.
a. ribosomes
b. mitochondria
c. golgi apparatus
mitochondria
Energy is stored long-term in the bonds of _____ and used short-term to perform work from a(n) ______ molecule.
a. glucose : ATP
b. ATP : glucose
c. an anabolic molecule : catabolic molecule
glucose : ATP
The cholesterol synthesized by cells uses which component of the glycolytic pathway as a starting point?
a. glucose
b. acetyl CoA
c. pyruvate
d. carbon dioxide
acetyl CoA
Which of the following is not a component of the endomembrane system?
a. Golgi apparatus
b. Mitochondrion
c. endoplasmic reticulum
d. lysosome
Mitochondrion
Active transport must function continuously because ___________.
a. cells must be in constant motion
b. diffusion is constantly moving the solutes in the other direction
c. plasma membranes wear out
diffusion is constantly moving the solutes in the other direction
The ________ modifies, sorts, tags, packages, and distributes lipids and proteins.
a. endoplasmic reticulum
b. golgi apparatus
c. lysosomes
golgi apparatus
The glucose that enters the glycolysis pathway is split into two molecules of _________.
a. ATP
b. pyruvate
c. phosphate
d. NADH
Pyruvate
Beta oxidation is ______.
a. the breakdown of fatty acid
b. the breakdown of sugars
c. the assembly of sugars
the breakdown of fatty acid
Which plasma membrane component can be either found on its surface or embedded in the membrane structure?
a. protein
b. cholesterol
c. carbohydrate
d. phospholipid
Protein
Which is NOT a part of Cell Theory?
a. Every organism is composed of one or more cells
b. The cell is the basic unit of life
c. New cells arise from preexisting cells
d. Prokaryotic and Eukaryotic cells are basic types of cells
Prokaryotic and Eukaryotic cells are basic types of cells
What two products result from photosynthesis?
a. water and oxygen
b. glucose and oxygen
c. glucose and carbon dioxide
glucose and oxygen
What do the electrons added to NAD+ do?
a. They are converted in NADP.
b. They go to another pathway for ATP production.
c. They become part of a fermentation pathway.
They become part of a fermentation pathway.
From where does a heterotroph directly obtain its energy?
a. the sun
b. the sun and eating other organisms
c. eating other organisms
d. simple chemicals in the environment
eating other organisms