Active Transport
Does active transport require ATP?
Yes, ATP is the source of energy for active transport
In passive transport the rate of diffusion goes from ____ concentration to ____ concentration.
high concentration to low concentration
What is an enzyme?
What is an enzyme?
A) A biological catalyst that speeds up chemical reactions in cells without being consumed in the process.
B) A type of carbohydrate that stores energy.
C) A cell that produces hormones.
D) A substance that slows down chemical reactions.
An enzyme is a biological catalyst that speeds up chemical reactions in cells without being consumed in the process.
What are the reactants of photosynthesis?
Water (H2O), Carbon dioxide (CO2)
What is a an example of eukaryotic cells ?
Animal or Bacteria
Animal Cell
Active transport goes from ____ concentration to ____ concentration.
Active transport goes from low concentration to high concentration.
Identify two of the statements that are correct for passive transport.
A. The movement of water across the cellular membrane during osmosis
B. The movement of molecules from areas high to low concentration
C. The sodium-potassium pump which uses ATP for energy.
D. The facilitated diffusion of oxygen across the cellular energy.
E. The movement of solutes across the cellular membrane from low to high concentration.
Osmosis
High to low Concentration
What happens when a enzyme is added to a chemical reaction?
A. The rate of reaction will decrease
B. The reaction will completely stop.
C. The activation energy will be lowered
E. The rate of reaction will start to increase
Increased reaction rate and lowered activation energy.
Neither created nor destroyed
If you eat a bar that says it will give you enough energy for a long workout. What type of biomolecule is involved?
Carbohydrates
In active transport, do the molecules move against or down the concentration gradient?
Down
In facilitated diffusion uses ___ in order for bigger or charge molecules to pass through the membrane.
Protein transport
How does temperature affect enzyme activity?
A) Increasing temperature always increases enzyme activity without limit.
B) Enzyme activity increases with temperature up to an optimum point, then decreases sharply.
C) Temperature has no effect on enzyme activity.
D) Enzyme activity decreases steadily as temperature rises.
B. Enzyme activity increases with temperature up to optimum point, then decreases sharply.
It will denature, slow it down
What is the relationship between reactants of photosynthesis and the products of cellular respiration?
The products of cellular respiration serve as the reactants of photosynthesis
Waxy coating of a plant, helps to reduce water loss because if is not water-permeable. This coating is an example of what molecule?
A. Carbohydrate
b. Lipid
C. Nucleic acid
D. Protein
Lipid
In sodium-potassium pump, for every 3 ions of sodium out of the cell, _________ of potassium ions go into the cell.
2 Potassium
If an egg is placed into a vinegar solution. After the vinegar dissolves into the egg. The egg is later being placed into a beaker filled with water. What would happen to the egg?
The egg will swell due to osmosis (passive transport)
Describe the concept of enzyme specificity.
Enzyme specificity refers to the ability of an enzyme to choose exact substrates from a group of similar chemical molecules. Each enzyme typically acts on a specific substrate.
What type of energy transformation occurs in photosynthesis?
Light energy to chemical energy
In a prokaryotic cell (bacteria) what are some organelles that you find in all cells.
a. Pilus, Capsule, Plasma membrane
b. Ribosomes, cytoplasm, cell membrane
c. Plasma membrane, Cell wall, Nucleoid
d. Cell wall, Ribosome Nucleoid
Ribosomes, cytoplasm and cell membrane
What are some examples of active transport?
Endocytosis, Exocytosis and Sodium-Potassium Pump
What are some examples of passive transport?
Diffusion, Osmosis
Explain how enzymes can be denatured and the implications of this process.
Enzymes can be denatured by extreme heat or pH changes, which can alter their structure and result in a loss of function, preventing them from catalyzing reactions effectively.
If you place a plant on the sun, meanwhile the other one is in the shade. What is produced in the sunny plant and not in the shady plant?
a. O2
b. CO2
c. H2
D. CO
Oxygen (O2)
Starch in plants are use for quick energy. What type of biomolecule is this?
Carbohydrates