WorksheetsDay 2 STAAR Review (BM/Enzymes/Succession)
Total questions: 15
Worksheet time: 8mins
An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?
Carbohydrates and lipids
Proteins and carbohydrates
Nucleic acids and carbohydrates
Lipids and nucleic acids
Carbohydrates are more easily metabolized than lipids. However, on a gram-for-gram basis lipids provide cells with more -
nitrogen
proteins
structure
energy
A table of four types of carbohydrates is shown. Which list correctly matches the functions to the types of carbohydrates?
A student preparing for a hike wants to pack a snack that has biomolecules that provide quickly available energy but few excess calories. Which nutrition label lists the best combination of biomolecules that provide quickly available energy while providing the fewest calories from other types of biomolecules?
Triglycerides are compounds created by combining a molecule of glycerol with three fatty acids. Triglycerides are used to store large amounts of energy and are classified as a form of which biomolecule?
carbohydrates
proteins
nucleic acids
lipids
Enzymes are proteins that have a three-dimensional shape that is specific to a particular substrate. Environmental conditions can change the shape of the protein. What is the most likely result if the shape of the enzyme changes?
The substrate will change its shape to match the enzyme.
The enzyme will no longer be able to catalyze the reaction with the substrate.
The products made from the enzyme and the substrate will be changed.
The enzyme will be able to bind to more diverse substrates than before.
The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on the data, this enzyme functions best at what temperature and pH?
The diagram represents one way an enzyme can be inhibited. Which statement explains the effect of an inhibitor on an enzyme?
A substrate will be able to bond with the enzyme.
The enzyme will likely be attacked by immune cells.
The enzyme will be unable to produce more enzymes..
A substrate will be unable to attach to the enzyme.
Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly's tail produces thousand of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speed up the chemical reaction?
Luciferase increases the amount of time the light is visible.
Luciferase decreases the amount of energy required for the reaction to start.
Luciferase increases the number of sites on luciferin.
Luciferase decreases the temperature of the environment inside the body of the firefly.
Enzymes are proteins that help increase the rate of chemical reactions inside cells. These proteins are composed of many simpler molecules called amino acids. Which of the following suggests that the shape of an enzyme determines the enzyme's function?
Enzymes are specific to a substrate.
Enzymes can operate in a wide rage of conditions.
Enzymes are activated by neighboring molecules.
Enzymes can be found in all life-forms.
A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.
What effect does continual mowing have on the ecology of the field?
Mowing increases the likelihood of nonnative species displacing native species.
Mowing increases the number of species found in the field.
Mowing causes different types of communities to form across the field.
Mowing maintains a low species diversity by inhibiting further succession.
The rocky material left behind by a retreating glacier forms what is called a moraine. When primary succession occurs on a moraine, which life forms will help create the soil by breaking down the rock?
Insects
Lichens
Grasses
Deciduous trees
As ecosystems move through the stages of succession, the populations of organisms in them change. Which of the following describes the stage of succession likely to have the most species diversity?
A newly formed volcanic island
An agricultural field that has not been plowed for one year
A temperate forest that has never been cleared by logging
A field that is regularly mowed
Surtsey is an island locate south of Iceland. The island was formed by a volcanic eruption and first appeared in 1963. the table contains description of changes in the population and diversity of species on Surtsey.
Which of the following lists the descriptions in the correct order of ecological succession on Surtsey?
I, II, IV, III
III, I, II, IV
IV, III, I, II
II, IV, I, III
The graph shows the basic changes in a forest community after a disturbance occurred. The information shown in the graph suggests that the changes in the forest community were caused by -
tree-leaf replacement after a storm
succession after a fire
repeated habitat destruction
decreased species diversity
