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Biochemistry & Cell Review
Biochemistry & Cell Review
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Quiz covering the basics of biochemistry and cell biology.
Flashcards
32 cards
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Questions
32
Answers
1
A red blood cell put in water will swell & burst. A plant cell will swell, but not burst. Why?
Plant cells lack a cell membrane
Animal cells are hypotonic to the water
Plant cells have a cell wall
Osmosis does not occur in plant cells
2
Which type of bond involves the sharing of electrons?
Ionic
Disulfide
Covalent
Hydrogen
3
Which of the following cell transport mechanisms do NOT require energy?
Endocytosis
Sodium-Potassium pump
Active transport
Facilitated diffusion
4
Most of the mass of an atom is in the ___________ & most of the volume is in the _________.
electrons, neutrons
electron cloud, nucleus
protons, neutrons
nucleus, electron cloud
5
Which of the following parts/organelles are NOT shared by both plant & animal cells?
Cell membrane
Ribosomes
Mitochondria
Cell wall
6
In photosynthesis, light is used to make chemical energy. Which is NOT a product of light rxns?
ATP
O2
NADPH
Sugar
7
What is a variable that is maintained constant among all test subjects and trials?
Independent variable
Controlled variable
Changed variable
Dependent variable
8
Which of the following is NOT a reason that proteins are important?
They are often used to transport things across the membrane
They help form the cytoskeleton for cell shape
They can help speed up chemical reactions
They have properties like cohesion, adhesion, good solvent
9
Enzymes are proteins that speed up reactions. A cell that needs a lot of enzymes needs:
A lot of ribosomes to produce the enzymes
A lot of cytoplasm to store them
A lot of cell wall to keep enzymes from escaping
A lot of membrane to surround them
10
What property of water molecules results in hydrogen bonding?
Cohesion
Unequal sharing of electrons
Equal sharing of electrons
Ionic bonding between O & H
11
What types of cell lacks a nucleus or membrane bound organelles?
Eukaryote
Animal cell
Prokaryote
Plant cell
12
DNA is used as a template to make which macromolecules?
Nucleic acids
Carbohydrates
Lipids
Proteins
13
Which of the following do cell respiration and photosynthesis have in common?
They both create sugars from CO2
They both break down sugars
They both produce oxygen
They both have electron transport chains
14
The cell membrane is made of a phospholipid bilayer. Which is true of this bilayer?
Hydrophobic heads avoid water
Hydrophobic tails are attracted to water
Hydrophilic heads avoid water
Hydrophobic tails avoid water
15
Cells are generally small because:
Cells need friends
The cell membrane cannot grow as the cell grows
A cell's volume grows quicker than its surface area
Cell walls prevent cells from getting too large
16
What is the process of nuclear division (followed by cell division) called?
Meiosis
Binary Fission
Mitosis
Replication
17
Which of the following is true about carbon?
It can form 4 covalent bonds
It can form 5 covalent bonds
It can form 3 covalent bonds
It can form 2 covalent bonds
18
Which of the following parts of an atom is neutral (no charge)?
Neutron
Nucleus
Electron
Proton
19
In diffusion, molecules move from high to low concentration. Molecules diffuse across membrane:
If they are small & uncharged
If they are charged
If they are large
If they are large & uncharged
20
The sugar that forms part of the backbone of DNA (with phosphate) is called:
Ribose
Adenine
Guanine
Deoxyribose
21
Which of the following would most likely result in an increase in the rate of photosynthesis?
Decrease in sunlight
Increase in sunlight
Increase in oxygen
Increase in water
22
If testing the effect of temp on cell resp in roaches, which is the independent variable?
O2 production
CO2 production
Size of roaches
Temperature
23
Which is NOT true of a family or group of atoms on the periodic table?
Atoms have similar properties
Atoms have the same number of electrons
Atoms have the same number of valence electrons
Atoms have similar bonding
24
Some atoms like Neon and Helium do not form covalent bonds. How come?
They have full valence shells & are stable
They gave full valence shells & are unstable
They have no valence electrons
They have incomplete valence shells & are stable
25
The observed or measured changes in an experiment is the ____________ variable.
Changed
Independent
Controlled
Dependent
26
DNA has specific base-pairing which allows it to be copied easily. Copying of DNA is known as:
Division
Mutation
Translation
Replication
27
Which of the following is NOT an example of homeostasis?
Maintaining blood glucose levels
Maintaining constant body temperature
All are examples of homeostasis
Increasing heart rate during exercise
28
Why are lipids generally hydrophobic ("water-fearing")?
Lipids have ionic bonds
Lipids have nonpolar covalent bonds
Lipids have aquaporins
Lipids have polar covalent bonds
29
Muscle cells need a lot of energy from ATP. Which organelle would muscle cells have a lot of?
Lysosomes
Ribosomes
Mitochondria
Chloroplasts
30
Which of the following does NOT happen during interphase (G1, S, or G2)?
DNA coils into chromosomes
The cell grows
DNA is replicated
Copies of organelles are made
31
The variable that is manipulated by YOU is called the ___________ variable.
Dependent
Independent
Changed
Controlled
32
A scientific graph needs all of the following EXCEPT:
Individual points labeled
Labeled x and y axis
Units
Title
