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WorksheetsBiology Keystone Review Module A #1
Total questions: 15
Worksheet time: 10mins
Which characteristic is shared by both prokaryotes and eukaryotes?
have organ systems
make their own food
contain genetic material
need oxygen gas to breathe
Which statement best explains why carbon is able to form a large number of different molecules?
Carbon forms only ionic bonds.
Carbon can form only ring structures.
Carbon can form four covalent bonds.
Carbon forms small, simple structures.
Which statement correctly describes how a protein is formed?
A monosaccharide bonded to a side chain is broken apart.
Amino acids are bonded together in a long chain to form a new molecule.
A molecule containing glycerol bonded to three fatty acids is broken apart.
A nitrogenous base, a sugar, and a phosphate group combine to form a new molecule.
Which action must occur for an enzyme to catalyze a chemical reaction?
A competitive inhibitor must first bind to an active site.
A substrate must bind to an active site of the enzyme.
A substrate must bind to an allosteric site of the enzyme.
A noncompetitive inhibitor must first bind to an active site.
Lipase is an enzyme that breaks down lipids in the digestive system of humans. It functions best at a pH range of 4.0 to 5.0. When a person takes an antacid tablet to relieve heartburn, the antacid increases the pH to around 7 in certain areas of the digestive system. Which initial effect would most likely be caused by a change in pH?
More lipids would be digested.
Fewer lipids would be digested.
The production of lipase molecules would increase.
The production of lipase molecules would decrease.
Use the lists below to answer the question. Cell Structures Observed in Two Organisms Cell Structures in Organism 1 Cell: cell wall • endoplasmic reticulum • Golgi body • chloroplasts • mitochondria • nucleus • ribosomes • vacuole Structures in Organism 2: • cell membrane • endoplasmic reticulum • Golgi body • mitochondria • nucleus • ribosomes Which statement describes the most likely difference in the way that organism 1 and organism 2 obtain energy?
Only organism 1 uses solar energy to make energy-rich compounds.
Only organism 1 stores solar energy until it is needed for its life processes.
Only organism 2 produces molecules for long-term energy storage.
Only organism 2 transforms food energy into ATP during cellular respiration.
A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which statement best describes how these processes are related to each other?
Both processes produce carbon dioxide.
Both processes require energy directly from the Sun.
Products of one process are used as some of the reactants for the other process.
Thermal energy from one process is used as the energy source for the other process.
A scientist observed that during the course of a chemical reaction the number of ATP molecules was reduced. What did the scientist most likely learn from the observation?
The reaction produced water.
The reaction consumed water.
The reaction caused an output of energy.
The reaction required an input of energy.
Which statement best describes how channel and carrier proteins in the plasma membrane are similar?
Both allow for the flow of molecules into and out of a cell.
Both directly connect the membrane to the nucleus of a cell.
Both use energy to continuously move water molecules out of a cell.
Both cause the phospholipid bilayer to form a rigid membrane for a cell.
Which process is primarily responsible for the production of oxygen in the atmosphere?
Glycolysis
Photosynthesis
Cellular respiration
Fermentation
What is the primary function of ribosomes in a cell?
To transport molecules
To produce energy
To synthesize proteins
To store genetic information
Which statement best describes the role of mitochondria in eukaryotic cells?
Mitochondria synthesize proteins.
Mitochondria are responsible for photosynthesis.
Mitochondria store genetic material.
Mitochondria generate ATP through cellular respiration.
Match the organelle to its description.
Power plant of the cell. They
create energy called ATP.
Ribosomes
Proteins are made on these small structures.
Nucleus
Controls all activity in the cell (the brain) and stores DNA
Cytoplasm
Outer lining the cells.
Controls what goes
in and out.
Mitochondrian
The fluid that fills the cell and
keeps the organelles in place
Cell Membrane
Match the following biological terms with their definitions.
Prokaryote
The basic unit of all forms of life
Nucleus
The control center of a cell
Eukaryote
A unicellular organism without a nucleus
Cell
An organism whose cells contain a nucleus
Match the following
Stores water
Vacuole
Converts energy
Chloroplast
Regulates cell contents
Mitochondria
Stores genetic material
Cell membrane
Produces sugar
Nucleus
