WGU C190 ACTUAL EXAM AND PRACTICE TESTS
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DETAILED ANSWERS| BRAND NEW VERSION!
1. What is the basic unit of life?
A. Atom
B. Molecule
C. Cell
D. Tissue
The cell is the smallest structure capable of carrying out all life processes.
Answer: C
2. Which macromolecule stores genetic information?
A. Proteins
B. Lipids
C. Carbohydrates
D. Nucleic acids
Nucleic acids (DNA/RNA) carry hereditary information.
Answer: D
3. What is the main function of enzymes?
A. Store energy
B. Catalyze reactions
C. Provide structure
D. Transport molecules
Enzymes speed up chemical reactions by lowering activation energy.
Answer: B
,4. Which organelle produces ATP?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Mitochondria are the site of cellular respiration and ATP production.
Answer: C
5. What type of bond forms between water molecules?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Hydrogen bonds form due to polarity between water molecules.
Answer: C
6. Which structure controls what enters and exits the cell?
A. Nucleus
B. Cell membrane
C. Cytoplasm
D. Ribosome
The cell membrane is selectively permeable.
Answer: B
7. What process moves water across a membrane?
A. Diffusion
B. Active transport
C. Osmosis
D. Endocytosis
,Osmosis is the diffusion of water across a semipermeable membrane.
Answer: C
8. Which phase of mitosis separates sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
During anaphase, chromatids are pulled apart to opposite poles.
Answer: C
9. DNA is composed of which units?
A. Amino acids
B. Nucleotides
C. Fatty acids
D. Monosaccharides
Nucleotides are the building blocks of DNA.
Answer: B
10. What is the purpose of photosynthesis?
A. Break down glucose
B. Produce ATP
C. Convert light energy into chemical energy
D. Create proteins
Photosynthesis stores energy in glucose using sunlight.
Answer: C
11. Which gas is released during photosynthesis?
A. Carbon dioxide
B. Oxygen
, C. Nitrogen
D. Hydrogen
Oxygen is a byproduct of splitting water molecules.
Answer: B
12. What is the main function of ribosomes?
A. Lipid synthesis
B. Protein synthesis
C. DNA replication
D. Energy storage
Ribosomes assemble amino acids into proteins.
Answer: B
13. Which level of organization includes similar cells working together?
A. Organ
B. Tissue
C. Organ system
D. Organism
Tissues are groups of similar cells performing a function.
Answer: B
14. What type of cell lacks a nucleus?
A. Eukaryotic
B. Prokaryotic
C. Plant
D. Animal
Prokaryotic cells do not have membrane-bound organelles.
Answer: B
15. Which macromolecule provides long-term energy storage?
NEWEST WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS| BRAND NEW VERSION!
1. What is the basic unit of life?
A. Atom
B. Molecule
C. Cell
D. Tissue
The cell is the smallest structure capable of carrying out all life processes.
Answer: C
2. Which macromolecule stores genetic information?
A. Proteins
B. Lipids
C. Carbohydrates
D. Nucleic acids
Nucleic acids (DNA/RNA) carry hereditary information.
Answer: D
3. What is the main function of enzymes?
A. Store energy
B. Catalyze reactions
C. Provide structure
D. Transport molecules
Enzymes speed up chemical reactions by lowering activation energy.
Answer: B
,4. Which organelle produces ATP?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Mitochondria are the site of cellular respiration and ATP production.
Answer: C
5. What type of bond forms between water molecules?
A. Ionic
B. Covalent
C. Hydrogen
D. Peptide
Hydrogen bonds form due to polarity between water molecules.
Answer: C
6. Which structure controls what enters and exits the cell?
A. Nucleus
B. Cell membrane
C. Cytoplasm
D. Ribosome
The cell membrane is selectively permeable.
Answer: B
7. What process moves water across a membrane?
A. Diffusion
B. Active transport
C. Osmosis
D. Endocytosis
,Osmosis is the diffusion of water across a semipermeable membrane.
Answer: C
8. Which phase of mitosis separates sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
During anaphase, chromatids are pulled apart to opposite poles.
Answer: C
9. DNA is composed of which units?
A. Amino acids
B. Nucleotides
C. Fatty acids
D. Monosaccharides
Nucleotides are the building blocks of DNA.
Answer: B
10. What is the purpose of photosynthesis?
A. Break down glucose
B. Produce ATP
C. Convert light energy into chemical energy
D. Create proteins
Photosynthesis stores energy in glucose using sunlight.
Answer: C
11. Which gas is released during photosynthesis?
A. Carbon dioxide
B. Oxygen
, C. Nitrogen
D. Hydrogen
Oxygen is a byproduct of splitting water molecules.
Answer: B
12. What is the main function of ribosomes?
A. Lipid synthesis
B. Protein synthesis
C. DNA replication
D. Energy storage
Ribosomes assemble amino acids into proteins.
Answer: B
13. Which level of organization includes similar cells working together?
A. Organ
B. Tissue
C. Organ system
D. Organism
Tissues are groups of similar cells performing a function.
Answer: B
14. What type of cell lacks a nucleus?
A. Eukaryotic
B. Prokaryotic
C. Plant
D. Animal
Prokaryotic cells do not have membrane-bound organelles.
Answer: B
15. Which macromolecule provides long-term energy storage?
