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WorksheetsReview Quizizz, Energy Transfer, Homeostasis, and Macromolecules
Total questions: 30
Worksheet time: 34mins
Homeostasis
allows for a wildly fluctuating internal environment
is impossible in vertebrates
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation
Why is the sensation of thirst important for maintaining homeostasis?
Water removed by the kidneys must be replaced
Oxygen cannot diffuse into cells if a person is dehydrated
Water molecules are needed to carry carbon dioxide waste to the kidneys
Why does pulse rate increase during exercise?
Oxygen and carbon dioxide must be removed from the body as soon as possible
Gas exchange must happen more quickly than when a person is at rest
Oxygen must be moved to the lungs and carbon dioxide must be moved to cells more quickly
Carbon dioxide must be moved to the kidneys to be excreted
Failure to maintain homeostasis could result in:
lack of internal balance
eventual death
difficulty carrying on metabolism
all three
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.
Positive Feedback Response
Negative Feedback Loop
When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels.
Positive Feedback Response
Negative Feedback Loop
Proteins are made of monomers called ___________
Nucleotides
Monosaccharides
Amino Acids
Glycerol and fatty acids
Nucleotides are monomers of
Carbohydrates
Lipids
Proteins
Nucleic Acids
What is the function of nucleic acids?
store genetic information
store energy (long-term)
store energy (short-term)
build skin, hair, nails, muscles
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
lipids
proteins
carbohydrates
nucleic acids
All polymers are made up of...
monosaccharides
monomers
proteins
None of these
Where does the energy from our food originally come from?
the Sun
chemical reactions
carbohydrates
mitochondria
What is the primary function of carbohydrates in your body?
Speed up chemical reactions.
Give immediate energy.
Help to store energy.
Build cell walls in plants.
Proteins are made of...
C H O
C H O N
C H O N P
C H O N S
Carbohydrates are made of...
C H O
C H O N
C H O N P
C H O N S
What is the function of an enzyme?
enzymes break themselves into small pieces
they slow down chemical reactions
they speed up chemical reactions
enzymes combine products to form reactants
Enzymes are composed of which of the following monomers?
amino acids
carbohydrates
nucleotides
monosaccharides
What is another name for enzymes?
chemical catalysts
microorganisms
biological catalysts
inorganic catalysts
What is a Catalyst?
A substance that speeds up a rate of chemical reaction.
Molecules that make enzymes work harder and faster
Reaction of an enzyme
A substance that slows down a rate of chemical reaction.
What are the raw materials of photosynthesis?
oxygen and carbon dioxide
oxygen and glucose
carbon dioxide and water
water and glucose
What are the products of photosynthesis?
oxygen and carbon dioxide
oxygen and glucose
carbon dioxide and water
water and glucose
Why are plants usually green?
Because the chlorophyll reflects green light
Because the chlorophyll absorbs green light
Because the accessory pigments combine to make green
Because the accessory pigments only absorb green light
If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)?
Sugar production will likely increase.
Sugars will not be produced.
The rate of sugar production will decrease.
Fewer sugars will be produced at first, but then the plant will recover.
This process releases chemical energy from sugars and other carbon-based molecules to make ATP when oxygen is present.
photosynthesis
light-independent reaction
cellular respiration
light-dependent reaction
What is the correct equation for cellular respiration?
6O2 + C6H12O6 -> 6CO2 + 6H2O + Energy
6O2 + C6H12O6 + Energy -> 6CO2 + 6H2O
6CO2 + 6H2O -> 6O2 + C6H12O6 + Energy
6CO2 + 6H2O + Energy -> 6O2 + C6H12O6
What is the name of the 1st step of cellular respiration?
Glycolysis
Kreb's Cycle
ETC
Anaerobic respiration
Which of the following is a reactant of cellular respiration?
Glucose
Carbon Dioxide
Water
ATP
Which of the following is a product of cellular respiration?
Glucose
Carbon Dioxide
Oxygen
Radiant Energy
Which statement is true regarding cellular respiration?
The reactants of cellular respiration are identical to the reactants of photosynthesis.
The reactants of cellular respiration are obtained from the products of photosynthesis.
The products of cellular respiration are the same as the products of photosynthesis.
Cellular respiration only occurs in autotrophs; photosynthesis occurs only in heterotrophs.
A decrease in the amount of oxygen available will...
not have an effect on the amount of energy produced during cellular respiration
decrease the amount of glucose produced during cellular respiration
cause the amount of water produced during cellular respiration to increase
decrease the amount of energy produced during cellular respiration
