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WorksheetsBiology Biochemistry Review
Total questions: 20
Worksheet time: 20mins
A scientist has discovered an unidentified organism. Cell theory states that which of the following must be true about this new living thing?
It cells come from preexisting cells.
All its cells have different functions.
It will not be made up of cells.
All its cells are considered nonliving.
Many scientists, including Matthias Schleiden and Theodor Schwann, contributed to cell theory. Which of the following is NOT one of the basic tenets of cell theory?
Cells are basic units of organisms.
All living things are composed of cells.
Cells can only arise from other cells.
All cells must eventually die.
What sort of evidence would support at least one of the components of cell theory?
Rocks and other nonliving things are not composed of cells.
Cells are observed converting one form of energy into another.
A microscope is necessary to make observations of nearly all cells.
The origin of all cells observed can be traced to previous cells.
Between 15,000 and 18,000 new species of organisms are discovered each year. Cell theory states that which of the following must be true about each new kind of organism?
It must be made up of one or more cells.
It cells must be able to make their own food.
All its cells must perform the same function.
Some of its cells must include a cell wall.
What can be concluded regarding the relationship between temperature and enzyme activity?
Temperature changes the kind of enzyme required for a reaction.
Enzymes function best in a small range of temperatures.
Increasing temperature causes a decrease in enzyme activity.
Enzymes will catalyze any reaction at any temperature.
Enzymes are biological substances, known as catalytic proteins. Which of the following is NOT a characteristic of enzymes?
Enzymes catalyze reactions by lowering the activation energy
Enzymes can react with any reactant.
The structure of the enzyme determines the chemical reaction.
The enzymes bind to the active site of the substrate.
Which graph below correctly represents the effect of an enzyme on the minimum amount of energy needed to start the chemical reaction in which it is involved?
Graph A
Graph B
Graph C
Graph D
The reactants that enzymes act upon are called substrates. Which of the following is true of enzymes and substrates?
Activation energy increases with the use of an enzyme.
Any location on the substrate works as a binding site.
The shape of an enzyme allows it to bind with specific substrates.
Enzymes can only be used once per substrate.
Which characteristic explains the similarity between proteins and lipids?
Contain nitrogen as part of their structure
Are composed of fatty acid chains
Are made up of chains of smaller subunits
Act as enzymes and contain peptide bonds
The table shown here describes the characteristics of a biomolecule. What biomolecule is described by these characteristics?
Protein
Carbohydrate
Nucleic acid
Lipid
This illustration provided here shows the components and structure of a biomolecule. What information shown in the diagram provides the best evidence that his biomolecule is a nucleic acid?
The numbers of hydrogen, carbon, and oxygen are in a 1:2:1 ratio
The presence of a phosphate, sugar, and nitrogenous base
The number of hydrogen ions relative to the amount of carbon
The presence of amine, carboxyl, and side chain groups
Which of the following matches the correct biomolecule with its function?
Lipids: molecules that build the genetic code
Carbohydrates: used as the primary source of energy
Proteins: help grow and repair tissue
Nucleic acids: move substances into and out of the cell
The diagram shown is of a biomolecule. Biomolecules can be identified by their components and structure. What information provided by the diagram indicates that his biomolecule is a protein?
The shape of the molecule allowing the side chain group on top
The amount of carbon relative to the amount of hydrogen
The presence of amine, carboxyl, and side chain groups
The double-bonded carbon and oxygen in the carboxyl group
Which of the following are the molecules that make up muscles and organs, transmit signals between cells, and constitute immune molecules?
Nucleic acids
Fatty acids
Carbohydrates
Proteins
Biomolecules are molecules, often macromolecules, that perform specialized functions within cells. Which of the following is the correct biomolecule and function of this image?
Lipids; move substances into and out of the cell
Carbohydrates; help grow and repair tissue
Proteins; used as the primary source of energy
Cholesterol; molecules that build the genetic code
A dissection microscope provides a three-dimensional image, due to what feature?
A fixed objective lens
A mirror light source
A larger stage
Two ocular lenses
How is the image provided by a scanning electron microscope (SEM) different from the image provided by a compound microscope?
The image provided by an SEM is at a higher resolution.
The image provided by a compound microscope is three-dimensional.
The image provided by an SEM is at a lower magnification.
The image provided by a compound microscope is black-and-white.
Specimens prepared for viewing must be coated in a reflective metal, such as gold, when which kind of microscope is used?
Dissecting microscope
Compound light microscope
Scanning electron microscope
Stereo microscope
Scientists must make informed choices about which tools to use for various tasks, including which kind of microscope is best suited to a particular investigation. Which of the following is NOT important to know in determining which kind of microscope should be used to view a particular specimen?
The type of material the specimen is made of
The age of the particular specimen
The size of the specimen being observed
The magnification required to view the specimen clearly
The magnification of a sample is controlled by changing the objective lenses in which of the following types of microscopes?
Compound microscope
Dissection microscope
Scanning electron microscope
Transmission electron microscope
