問題一覧
1
Which of the following is not a function of the cell membrane?
Storing genetic information
2
How are endocytosis and exocytosis different from each other?
Endocytosis is the process of taking material into the cell, while exocytosis is the process of releasing material from the cell
3
What is the main difference between passive transport and active transport of materials across a cell membrane?
Active transport requires energy, while passive transport does not
4
A substance that moves by passive transport tends to move:
Away from the area where it is more concentrated
5
What is the function of the cytoskeleton?
To provide structural support and shape for the cell
6
Which type of biomolecule regulates cell processes or transports material into and out of cells?
Proteins
7
An enzyme speeds up a reaction by:
Lowering the activation energy
8
How do enzymes act as catalysts in a chemical reaction?
By lowering the activation energy
9
Despite differences in size and shape, at some point all prokaryotic and eukaryotic cells have DNA and a:
Cell membrane
10
The organelles that break down lipids, carbohydrates, and proteins into small molecules that can be used by the cell are called:
Lysosomes
11
Which type of organism consists of specialized cells?
Multicellular eukaryotes
12
What is the relationship among solutions, solutes, and solvents?
Solutes dissolve in solvents to form solutions
13
In what way does specialization of cells contribute to maintaining homeostasis in multicellular organisms?
Different cells perform different tasks, helping maintain balance
14
The cellular structure that distinguishes a prokaryotic cell from a eukaryotic cell is the presence of:
A nucleus
15
Which type of biomolecule stores genetic information?
Nucleic acids
16
What is the name for the amount of energy that a reaction needs to get started?
Activation energy
17
What are the two major components of the cell membrane, and what model describes their arrangement?
Lipids and proteins, the fluid mosaic model
18
How are lipids oriented in the cell membrane, based on the hydrophilic and hydrophobic parts of the molecules?
The hydrophilic heads face outward, and the hydrophobic tails face inward
19
What changes to the environment can affect the activity of enzymes?
Temperature, pH, and substrate concentration
20
Which type of bonds hold two or more water molecules together?
Hydrogen bonds