WorksheetsAP Biology Science Practices
Total questions: 15
Worksheet time: 15mins
In what phase of the cell cycle does DNA replication take place?
G1
S
G2
M
What is A?
Leading strand
Lagging strand
Okazaki Fragments
DNA plymerase
The separation of the two single strands of DNA creates a ‘Y’ shape?
enzyme
unzip
A replication fork
Which enzyme proofreads and removes RNA Primase
Ligase
Polymerase 1
Polymerase 3
Helicase
Which of the following statements about diffusion is true?
It is very rapid of long distances.
It requires an expenditure of energy by the cell.
It is an active process in which molecules move from a region of lower concentration to a region of higher concentration.
It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.
Which cell is in a hypertonic environment?
A
B
C
None of them are hypertonic
Assuming that the purple molecules are too large to pass through the membrane, what would happen to the water level as a result of osmosis?
The water level would rise on the A side
The water level would rise on the B side
The water level would remain constant
The water level would drop on the A side.
According to the fluid mosaic model of cell membranes, phospholipids___________________.
can shift laterally along the plane of the membranee
frequently flip-flop from one side of the membrane to the other
occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
have hydrophilic tails in the interior of the membrane
Which of the following types of molecules are hydrophilic and therefore excluded from the hydrophobic portion of the phospholipid bilayer?
transmembrane proteins
integral membrane proteins
peripheral proteins
cholesterol
In what way do the membranes of a eukaryotic cell vary?
Phospholipids are found only in certain membranes
Certain proteins are unique to each membrane
Only certain membranes of the cell are selectively permeable
Some membranes have hydrophobic surfaces exposed to the cytoplasm while others have hydrophilic surfaces facing the cytoplasm.
Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?
It exhibits specificity for a particular type of molecule
It requires the expenditure of cellular energy to function.
It works against diffusion.
It has not hydrophobic regions.
Which of the following would likely diffuse through the lipid bilayer of a plasma membrane most rapidly?
sucrose.
an amino acid.
O2.
Na+.
Which of the following best describes the role of a control group in an experiment?
To provide a standard for comparison against the experimental group
To ensure that the experiment is conducted under controlled conditions
To eliminate the need for replication in the experiment
To increase the sample size of the experiment
In the context of AP Biology Science Practices, what is the primary purpose of using a model in scientific research?
To simplify complex systems and make predictions
To replace experiments with simulations
To prove a scientific theory
To collect data from natural environments
When analyzing a graph showing the rate of photosynthesis at different light intensities, what conclusion can be drawn if the rate levels off at high light intensities?
Photosynthesis is no longer occurring
The plant has reached its light saturation point
The plant is using more water
The temperature is too high for photosynthesis
