Karp’s Cell & Molecular Biology Exam
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1. Which of the following is a characteristic of prokaryotic cells?
A. Membrane-bound nucleus
B. Lack of membrane-bound organelles
C. Presence of mitochondria
D. Linear DNA
Prokaryotic cells lack membrane-bound organelles, including a
nucleus, distinguishing them from eukaryotic cells.
2. What is the primary function of ribosomes?
A. DNA replication
B. Lipid synthesis
C. Protein synthesis
D. ATP production
Ribosomes translate mRNA into proteins, performing the essential
function of protein synthesis.
3. Which of the following molecules forms the basic structure of cell
membranes?
A. Nucleic acids
B. Proteins
C. Phospholipids
D. Carbohydrates
,Phospholipids organize into a bilayer, creating a hydrophobic interior
and hydrophilic exterior essential for cell membrane structure.
4. During osmosis, water moves across a semipermeable
membrane from:
A. High solute concentration to low solute concentration
B. Low solute concentration to high solute concentration
C. Low water concentration to high water concentration
D. Active transport
Osmosis is the passive movement of water from areas of low solute
(high water) to high solute (low water) concentration.
5. Which organelle is responsible for ATP production?
A. Golgi apparatus
B. Lysosome
C. Nucleus
D. Mitochondrion
Mitochondria generate ATP via oxidative phosphorylation, making
them the cell’s energy powerhouse.
6. What type of bond holds the two strands of DNA together?
A. Covalent bonds
B. Ionic bonds
C. Hydrogen bonds
D. Peptide bonds
Hydrogen bonds between complementary base pairs stabilize the
DNA double helix.
, 7. Enzymes function by:
A. Being consumed in reactions
B. Lowering the activation energy of reactions
C. Changing the equilibrium of reactions
D. Acting as energy sources
Enzymes accelerate reactions by lowering the activation energy
without being consumed.
8. Which macromolecule stores genetic information?
A. Protein
B. Carbohydrate
C. Lipid
D. Nucleic acid
DNA and RNA, types of nucleic acids, store and transmit genetic
information.
9. What is the main function of the Golgi apparatus?
A. Energy production
B. Protein degradation
C. Protein modification and trafficking
D. DNA replication
The Golgi modifies, sorts, and packages proteins and lipids for
secretion or delivery to organelles.
10. In eukaryotic cells, transcription occurs in the:
A. Ribosome
B. Nucleus
Preparation Newest With Complete
Questions And Correct Detailed Answers|
Brand New Version
1. Which of the following is a characteristic of prokaryotic cells?
A. Membrane-bound nucleus
B. Lack of membrane-bound organelles
C. Presence of mitochondria
D. Linear DNA
Prokaryotic cells lack membrane-bound organelles, including a
nucleus, distinguishing them from eukaryotic cells.
2. What is the primary function of ribosomes?
A. DNA replication
B. Lipid synthesis
C. Protein synthesis
D. ATP production
Ribosomes translate mRNA into proteins, performing the essential
function of protein synthesis.
3. Which of the following molecules forms the basic structure of cell
membranes?
A. Nucleic acids
B. Proteins
C. Phospholipids
D. Carbohydrates
,Phospholipids organize into a bilayer, creating a hydrophobic interior
and hydrophilic exterior essential for cell membrane structure.
4. During osmosis, water moves across a semipermeable
membrane from:
A. High solute concentration to low solute concentration
B. Low solute concentration to high solute concentration
C. Low water concentration to high water concentration
D. Active transport
Osmosis is the passive movement of water from areas of low solute
(high water) to high solute (low water) concentration.
5. Which organelle is responsible for ATP production?
A. Golgi apparatus
B. Lysosome
C. Nucleus
D. Mitochondrion
Mitochondria generate ATP via oxidative phosphorylation, making
them the cell’s energy powerhouse.
6. What type of bond holds the two strands of DNA together?
A. Covalent bonds
B. Ionic bonds
C. Hydrogen bonds
D. Peptide bonds
Hydrogen bonds between complementary base pairs stabilize the
DNA double helix.
, 7. Enzymes function by:
A. Being consumed in reactions
B. Lowering the activation energy of reactions
C. Changing the equilibrium of reactions
D. Acting as energy sources
Enzymes accelerate reactions by lowering the activation energy
without being consumed.
8. Which macromolecule stores genetic information?
A. Protein
B. Carbohydrate
C. Lipid
D. Nucleic acid
DNA and RNA, types of nucleic acids, store and transmit genetic
information.
9. What is the main function of the Golgi apparatus?
A. Energy production
B. Protein degradation
C. Protein modification and trafficking
D. DNA replication
The Golgi modifies, sorts, and packages proteins and lipids for
secretion or delivery to organelles.
10. In eukaryotic cells, transcription occurs in the:
A. Ribosome
B. Nucleus
