WorksheetsB. Unit 1 - before exam review
Total questions: 19
Worksheet time: 11mins
A muscle tear injury would probably involve the rupture of which type of cell junction?
anchoring junction/desmosome
gap junction
tight junction
If red blood cells containing 20% sucrose and 80% water are placed in a solution containing 45% sucrose and 55% water, what happens to the cells (assuming that sucrose cannot permeate the cell membrane but water can)?
The cells swell because water of a net movement of water into the cells
The cells shrivel because of a net movement of water out of the cells
The cells remain unchanged due to equal water concentrations inside and outside the cell
As a cell grows, its plasma membrane expands. Does this involve endocytosis or exocytosis?
Endocytosis
Exocytosis
How does a protein like insulin move from the ribosome where it is synthesized to the bloodstream?
the protein pops off the ribosome and diffuses out of the cell
the protein moves from the ribosome through the rough ER to the golgi to the cell membrane via positive/negative attraction
the protein moves from the ribosome through the rough ER to the golgi to the cell membrane via vesicular transport
Active transport
occurs when a molecule moves from high to low concentration
occurs when a molecule is nonpolar
occurs when a molecule is large and polar or charged
occurs when a molecules moves from low to high concentration
C and D are correct
Which of the following is not an example of protein function?
transport of molecules from inside to outside the cell and vice versa
enzymatic activity
signal transduction
creating a semipermeable barrier between the inside and outside of the cell
Which of the following permit communication between cells?
tight junctions
gap junctions
plasmodesmata
anchoring junctions
B and C are true
The endosymbiont theory states...
eukaryotes came before prokaryotes
mitochondria were living in water and other cells took them in and used them and this resulted in mitochondria in eukaryotic cells
free-living bacteria were engulfed by larger cells and they coexisted and this resulted in mitochondria in eukaryotic cells
Mitochondria and chloroplasts
both are involved in energy processing
both contain their own DNA and ribosomes
both resemble prokaryotic cells
all of the above are true
The smooth ER
is involved in detox and lipid synthesis
is involved in protein folding
is involved in packaging and distribution of proteins to their final destination
is involved in digestion of materials
This molecule looks most like a
carbohydrate
protein
nucleic acid
lipid
This molecule is a
carbohydrate
protein
lipid
nucleic acid
The ion circled in red is a
anion
cation
Both plant and animal cells _____.
have a large central vacuole
undergo photosynthesis
have chloroplasts
undergo cellular respiration
Which of the following is nonpolar?
This is an example of a
eukaryotic animal cell
eukaryotic plant cell
prokaryotic bacterial cell
This process happens primarily in the
mitochondria
chloroplast
endomembrane system
none of the above
This diagram refers to
the process of evolution
the central dogma
the fact that structure and function are related
the fact that life relies on energy transfers
A salmon might swim from the ocean up a freshwater stream to reproduce.
The salmon is moving from a _____ environment to a _____ environment.
hypertonic, hypotonic
hypotonic, hypertonic
