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WorksheetsDCD Unit3
Total questions: 18
Worksheet time: 16mins
Which statement best describes these two molecules?
Sugar molecules are inorganic and fat molecules are organic.
Sugar molecules are organic and fat molecules are inorganic.
Energy for life processes can be stored within the chemical bonds of both molecules.
.
Energy for life processes can be stored within the chemical bonds of sugar molecules, only
Pepsin works best in which type of environment?
Acidic only
basic, only
neutral
sometimes acidic, sometimes basic
Which statement best describes the enzyme represented in the graphs below?
This enzyme works best at a temperature above 50°C and a pH above 12.
This enzyme works best at a temperature of 50°C and a pH of 12
.
Temperature and pH have no effect on the action of this enzyme.
This enzyme works best at a temperature of 35°C and a pH of 8.
Experiments revealed the following information about a certain molecule:
It can be broken down into amino acids.
It can break down proteins into amino acids.
It is found in high concentrations in the small intestine of humans.
This molecule is most likely ___.
inorganic
carbohydrates
enzymes
Lipids
An amoeba is a single-celled, heterotrophic organism. In order to meet its energy needs, it relies directly on the interaction of which cell structures?
Vacuole and nucleus
the cell membrane and mitochondria
Rough ER and Ribosomes
Chloroplast and membrane
It may be harmful when people compete to see who can hold their breath the longest under water. Without oxygen, brain cells _____.
have to much water
cannot make enough ATP
have to much sugar
Make to many enzymes.
In which direction do particles in a solution move during diffusion?
from left to right
from lower to higher areas of concentration
from higher to lower areas of concentration
from right to left
What is a difference between the two macromolecules in the image?
Starch is smaller than glucose
Glucose is smaller than starch
Starch has 1 ring
Starch has the same amount of rings as glucose.
What is a difference between the two macromolecules in the image?
Starch is used for quick energy and glucose is for stored energy.
Starch is used for stored energy and glucose for stored energy.
Starch is used for stored energy and glucose for quick energy.
No differences
Base your answer to the following question on the diagram below, which represents a chemical reaction that occurs in the human body, and on your knowledge of biology. Substances X and Y are examples of which kind of molecule?
simple sugar
fat
hormone
amino acid
Which set of terms best identifies the letters in the diagram below?
1
2
3
4
Cells in the stomach produce pepsin, an enzyme, to help digest food. Pepsin works best at a pH of 2. Which of these graphs most likely shows what will happen to the activity of pepsin as the pH of the stomach is increased?
A
B
C
D
What type of molecule is catalase?
Prion
lipid
Protien
sugar
Which of these statements explains why the plants in Groups E and F died?
.
The high sugar content caused too much water to move out of the root cells.
The high sugar content caused too much water to move into the root cells.
The high sugar content clogged the pores in the cell membranes.
They didn't die
Protein pumps actively transport ions across a cell membrane. What molecule directly supplies the energy required for this transport?
ATP
Water
Oxygen
RNA
Which gas would most likely be found in the greatest amount in the bubbles?
Oxygen
Carbon dioxide
ozone
smoke
Which of the following diagrams represents the correct cycling of gases?
A
B
C
D
f 2
Methods A and B are classified as methods of passive transport because they do not require ____.
ATP
Carbon Dioxide
light
DNA
