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- Multiple ChoicePlease save your changes before editing any questions.
A scientist isolates a number of non-photosynthetic prokaryotes.
Which structure would be found in these cells?
chloroplast
cell walls
golgi
nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which of these structures would be present in an animal cell?
Cell Wall
DNA
Nucleus
Ribosome
- Multiple ChoicePlease save your changes before editing any questions.
Which of these structures would be present in bacteria cells?
Cell Wall
DNA
Nucleus
Ribosome
- Multiple ChoicePlease save your changes before editing any questions.
A student is asked to draw four cells.
Which drawing is a representation of a prokaryotic cell?
- Multiple ChoicePlease save your changes before editing any questions.
Which pair of organelles works together to give structure and support in animal cells?
Cell wall and cytoplasm
Cell membrane and cytoskeleton
Cytoskeleton and Golgi complex
Endoplasmic reticulum and cell membrane
- Multiple ChoicePlease save your changes before editing any questions.
A group of students studied four different cell specimens under a microscope and recorder information about each cell in this table.
Which cell specimen is a prokaryote?
Cell 1
Cell 2
Cell 3
Cell 4
- Multiple ChoicePlease save your changes before editing any questions.
The presence of which structure helps classify an organism as eukaryotic?
Nucleus
Cell Wall
Flagellum
Chromosome
- Multiple ChoicePlease save your changes before editing any questions.
Chief cells are found in the glands that line the inside of the stomach. These cells secrete large amounts of enzymes to aid in food digestion.
Which cellular structure will be more abundant in chief cells because of their high rate of enzyme secretion?
endoplasmic reticulum
nuclear envelope
cytoskeleton
cell wall
- Multiple ChoicePlease save your changes before editing any questions.
A student performs an experiment to study the transport of water in and out of cells. He uses clear, semi-permeable plastic bags to represent the cell membrane. The student places three plastic bags of the same size, each containing a 1% concentration sucrose solution, into three different beakers. One beaker contains distilled water, another beaker contains a 3% concentration sucrose solution, and the third beaker contains a 1% concentration sucrose solution. The diagram shows the student's experimental setup, the plastic bag before it is placed in the beakers, and the appearance of the bags after an hour in each solution.
Which statement provides a conclusion about the transport of water in and out of cells based on the results of the student's experiment?
Water moves freely both inside and outside the cell independent of the solute concentration.
Water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell.
Water transports solutes out of the cell to balance the percent concentration of solutes both inside and outside the cell.
Water moves into the cell and solutes move out of the cell to ensure their concentration is balanced both inside and outside the cell.
- Multiple ChoicePlease save your changes before editing any questions.
A red blood cell is placed into an aqueous solution. The red blood cell has a lower concentration of protein and sugar than the aqueous solution, as shown in the diagram. In the diagram, the volume of the cell is equal to the volume outside the cell.
What is most likely to occur?
Water from the solution will diffuse into the red blood cell.
Water from the red blood cell will diffuse into the solution.
Protein and sugar from the solution will diffuse into the red blood cell.
Protein and sugar from the red blood cell will diffuse into the solution.
- Multiple ChoicePlease save your changes before editing any questions.
How is chemosynthesis different from photosynthesis?
Chemosynthesis does not require enzymes.
Chemosynthesis can occur in environments without sunlight.
Chemosynthesis does not require reactants from outside the cell.
Chemosynthesis produces sugars that organisms use as an energy source.
- Multiple ChoicePlease save your changes before editing any questions.
Students investigate how light intensity affects the rate of photosynthesis in an aquatic plant. Their data is shown in the table.
Which graph shows the relationship between the rate of photosynthesis and light intensity?
- Multiple ChoicePlease save your changes before editing any questions.
Students in a biology class conduct an experiment to determine the effect of temperature on the rate of photosynthesis in a plant. They place an Elodea plant into a test tube filled with water. The, the students place the test tube under a light and slowly increase the temperature of the water. They record their results and display them on a graph as shown.
Which statement is supported by the data in the graph?
The rate of oxygen production is lowest in section M.
The rate of oxygen production is greatest in section M.
The production of water molecules is greatest in section L.
The number of carbon dioxide molecules in the beaker is greatest in section K.
- Multiple ChoicePlease save your changes before editing any questions.
Which statement explains the effect of temperature on the rate of photosynthesis?
Oxygen molecules break down at temperatures above 25oC.
The rate of photosynthesis is unaffected by the temperature of the water.
The number of chloroplasts in the cell decreases as temperature increases.
Enzymes involved with plant photosynthesis and disrupted at temperatures above 25oC.
- Multiple ChoicePlease save your changes before editing any questions.
The diagram models the time-lapse movement of particles across a cell membrane. The particles have characteristics that allow them to pass freely across the membrane.
Select all of the statements that describe the particles or their movement based on the time-lapse diagram.
The particles crossing the membrane do not have a charge.
The movement across the membrane requires energy from ATP.
The particles crossing the membrane could be water (H2O) or oxygen (O2).
The movement across the membrane does not require added energy.
The particles crossing the membrane could be proteins or carbohydrates.
- Multiple ChoicePlease save your changes before editing any questions.
The presence of which structure helps classify an organism as eukaryotic?
nucleus
cell wall
flagellum
chromosome
- Multiple ChoicePlease save your changes before editing any questions.
A student fills a beaker with a 5% salt solution. The student places a dialysis bag containing a 15% salt solution into the beaker. Then the student measures the salinity of the salt solution in the beaker after 5 minutes. The dialysis tubing is permeable to salt.
Which direction will salt move immediately after placing the dialysis tubing in the beaker?
into the tubing
out of the tubing
no movement of water
- Multiple ChoicePlease save your changes before editing any questions.
Oxygen in the Earth's early atmosphere was generated by marine organisms such as cyanobacteria, which are sometimes called blue-green algae.
By what process did cyanobacteria oxygenate the atmosphere?
fermentation
photosynthesis
protein synthesis
cellular respiration
- Multiple ChoicePlease save your changes before editing any questions.
A student fills a beaker with a 5% salt solution. The student places a dialysis bag containing a 15% salt solution into the beaker. Then the student measures the salinity of the salt solution in the beaker after 5 minutes. The dialysis tubing is permeable to water.
Which direction will water move immediately after placing the dialysis tubing in the beaker?
into the tubing
out of the tubing
no movement of water