WorksheetsUnit 1: Char of Life, Biochem, and Enzymes
Total questions: 19
Worksheet time: 10mins
Which statement best describes the enzyme represented in the graph?
This enzyme works best at a temperature of 35 degrees Celsius
This enzyme works best at 10 degrees Celsius
This enzyme works best at 50 degrees Celsius
Temperature has no effect on the enzyme
This enzyme works best at a pH of 8
This enzyme works best at a pH of 50
pH does not have any effect on an enzyme.
This enzyme is inhibited by a pH of 8.
Proteins differ from one another because
the number of nucleotides differs
each protein contains its own sequence of sugar molecules
the sequence of amino acids is different for each protein
peptide bonds determine the function of proteins
What is the independent variable for this graph?
number of animals
Wolf population
moose population
years
Which of the following would be a function of the nucleic acids?
store energy
movement
genetic information
insulation
Which class of biomolecule includes monosaccharides like glucose, and polysaccharides like starch?
nucleic acids
carbohydrates
lipids
proteins
Polar bears eat as much food as they can during the summer months because they need the extra calories to survive the harsh winter conditions. What type of biomolecules would the polar bear need to consume during the summer for this protection in the winter?
lipids
carbohydrates
proteins
nucleic acids
The enzyme amylase is found in saliva and assists with the break down of starch into glucose. Explain how this occurs without affecting the chemical makeup of the amylase.
Amylase bonds to the starch to speed up the reaction and detaches itself when complete, without being affected.
Amylase does not take place in the starch reaction, but raises the temperature of the saliva to speed up the reaction.
Amylase changes starch into a vapor which increases the reaction rate, but is recreated by the glucose.
Amylase transfers all of its energy to the the starch molecules to slow down the reaction, but does not take place in the reaction.
Amino Acids are to proteins as
nucleotides are to nucleic acids
monosaccharides are to lipids
fatty acids are to carbohydrates
enzymes are to disaccharides
Which of the following is not a characteristic of living things?
all living things are composed of cells
all living things need energy
all living things grow and develop
all living things breathe carbon dioxide
Viruses are not classified as living because they
do not reproduce
do not evolve
do not contain DNA or RNA
are not composed of cells
Which of the following characteristics of living things best explains why birds fly south for the winter?
living things are made up of cells
living things maintain homeostasis
living things grow and develop
living things respond to their environment
Which of the following characteristics of living things best explains why humans sweat when they get hot?
living things evolve
living things use energy
living things try to maintain homeostasis
living things contain cells
Which image represents the reactant?
A
B
C and D
E
Which letter represents an enzyme-substrate complex?
A
B
C
E
Which letter represents a product?
A
B and D
C
E
What is the dependent variable in this graph?
Insect Coloration
Percentage of insects eaten by birds
Which insects are eaten most often by birds?
Bright
Camouflage
Both are eaten in the same amount
What determines how organic molecules will function?
shape determines function
order of amino acids determines function of protein
order of nucleotides determines the type of organism
all are true
