Biology 101 Final Exam 2026-2027: 100
Practice Questions & Answers on Cell
Biology, Genetics, Evolution, Ecology &
Metabolism | University-Level Study Guide
Description:
Master introductory biology with 100 exam-style questions covering photosynthesis,
cellular respiration, mitosis, meiosis, Mendelian genetics, Hardy-Weinberg, enzyme
function, and ecosystem dynamics. Fully updated for 2026-2027 academic standards with
detailed explanations for every answer.
Perfect for exam prep, study guides, and digital learning.
Download now and pass your biology final with confidence.
, Biology 101 Final Exam 2026-2027 | 100 Questions & Answers
This examination paper is designed to assess foundational knowledge in biology, including
cell biology, genetics, evolution, ecology, and metabolism. All questions reflect current
academic standards and best practices in the life sciences.
Section A: Photosynthesis and Plant Biology
Question 1
What is the primary function of chlorophyll in photosynthesis?
A) Absorb carbon dioxide
B) Capture solar energy
C) Produce oxygen
D) Split water molecules
Answer: B) Capture solar energy
Explanation: Chlorophyll is the green pigment located in chloroplasts that absorbs light
energy, primarily from the blue and red wavelengths, and converts it into chemical energy
during the light-dependent reactions of photosynthesis.
Question 2
Where do the light-independent reactions (Calvin cycle) occur in a plant cell?
A) Thylakoid membrane
B) Inner mitochondrial membrane
C) Stroma of the chloroplast
D) Cytoplasm
Answer: C) Stroma of the chloroplast
Explanation: The Calvin cycle takes place in the stroma, the fluid-filled space surrounding
the thylakoids within chloroplasts. This is where carbon dioxide is fixed into organic sugars
using ATP and NADPH produced in the light-dependent reactions.
,Question 3
During photosynthesis, carbon dioxide is:
A) Oxidized to glucose
B) Reduced to glucose
C) Converted directly to oxygen
D) Stored as starch
Answer: B) Reduced to glucose
Explanation: Carbon dioxide gains electrons (and hydrogen atoms) during the Calvin cycle
to form glucose, a process called reduction. The electrons come from NADPH, which is
produced in the light reactions.
Question 4
Which organism is an example of an autotroph?
A) Human
B) Cow
C) Green plant
D) Escherichia coli
Answer: C) Green plant
Explanation: Autotrophs produce their own organic compounds from inorganic sources
using light (photoautotrophs) or chemical energy (chemoautotrophs). Green plants are
photoautotrophs, while humans, cows, and E. coli are heterotrophs.
Section B: Cellular Respiration and Metabolism
Question 5
Where does glycolysis take place in a eukaryotic cell?
A) Mitochondrial matrix
B) Nucleus
C) Cytoplasm
D) Endoplasmic reticulum
, Answer: C) Cytoplasm
Explanation: Glycolysis occurs in the cytosol (cytoplasm) and does not require oxygen. It
breaks down one glucose molecule into two pyruvate molecules, producing a net gain of 2
ATP and 2 NADH.
Question 6
What is the total number of ATP molecules produced per glucose molecule during complete
cellular respiration in modern textbooks?
A) 2
B) 8–10
C) 30–32
D) 36–38
Answer: C) 30–32
Explanation: Revised estimates account for the cost of transporting NADH from glycolysis
into the mitochondria and variations in proton leaks. The current consensus is approximately
30–32 ATP per glucose, though older texts may cite 36–38 ATP.
Question 7
The electron transport chain (ETC) is located in which part of the mitochondria?
A) Outer membrane
B) Inner membrane
C) Matrix
D) Intermembrane space
Answer: B) Inner membrane
Explanation: The ETC is embedded in the inner mitochondrial membrane, where electron
carriers pass electrons through protein complexes, pumping protons into the intermembrane
space to drive ATP synthesis via chemiosmosis.
Practice Questions & Answers on Cell
Biology, Genetics, Evolution, Ecology &
Metabolism | University-Level Study Guide
Description:
Master introductory biology with 100 exam-style questions covering photosynthesis,
cellular respiration, mitosis, meiosis, Mendelian genetics, Hardy-Weinberg, enzyme
function, and ecosystem dynamics. Fully updated for 2026-2027 academic standards with
detailed explanations for every answer.
Perfect for exam prep, study guides, and digital learning.
Download now and pass your biology final with confidence.
, Biology 101 Final Exam 2026-2027 | 100 Questions & Answers
This examination paper is designed to assess foundational knowledge in biology, including
cell biology, genetics, evolution, ecology, and metabolism. All questions reflect current
academic standards and best practices in the life sciences.
Section A: Photosynthesis and Plant Biology
Question 1
What is the primary function of chlorophyll in photosynthesis?
A) Absorb carbon dioxide
B) Capture solar energy
C) Produce oxygen
D) Split water molecules
Answer: B) Capture solar energy
Explanation: Chlorophyll is the green pigment located in chloroplasts that absorbs light
energy, primarily from the blue and red wavelengths, and converts it into chemical energy
during the light-dependent reactions of photosynthesis.
Question 2
Where do the light-independent reactions (Calvin cycle) occur in a plant cell?
A) Thylakoid membrane
B) Inner mitochondrial membrane
C) Stroma of the chloroplast
D) Cytoplasm
Answer: C) Stroma of the chloroplast
Explanation: The Calvin cycle takes place in the stroma, the fluid-filled space surrounding
the thylakoids within chloroplasts. This is where carbon dioxide is fixed into organic sugars
using ATP and NADPH produced in the light-dependent reactions.
,Question 3
During photosynthesis, carbon dioxide is:
A) Oxidized to glucose
B) Reduced to glucose
C) Converted directly to oxygen
D) Stored as starch
Answer: B) Reduced to glucose
Explanation: Carbon dioxide gains electrons (and hydrogen atoms) during the Calvin cycle
to form glucose, a process called reduction. The electrons come from NADPH, which is
produced in the light reactions.
Question 4
Which organism is an example of an autotroph?
A) Human
B) Cow
C) Green plant
D) Escherichia coli
Answer: C) Green plant
Explanation: Autotrophs produce their own organic compounds from inorganic sources
using light (photoautotrophs) or chemical energy (chemoautotrophs). Green plants are
photoautotrophs, while humans, cows, and E. coli are heterotrophs.
Section B: Cellular Respiration and Metabolism
Question 5
Where does glycolysis take place in a eukaryotic cell?
A) Mitochondrial matrix
B) Nucleus
C) Cytoplasm
D) Endoplasmic reticulum
, Answer: C) Cytoplasm
Explanation: Glycolysis occurs in the cytosol (cytoplasm) and does not require oxygen. It
breaks down one glucose molecule into two pyruvate molecules, producing a net gain of 2
ATP and 2 NADH.
Question 6
What is the total number of ATP molecules produced per glucose molecule during complete
cellular respiration in modern textbooks?
A) 2
B) 8–10
C) 30–32
D) 36–38
Answer: C) 30–32
Explanation: Revised estimates account for the cost of transporting NADH from glycolysis
into the mitochondria and variations in proton leaks. The current consensus is approximately
30–32 ATP per glucose, though older texts may cite 36–38 ATP.
Question 7
The electron transport chain (ETC) is located in which part of the mitochondria?
A) Outer membrane
B) Inner membrane
C) Matrix
D) Intermembrane space
Answer: B) Inner membrane
Explanation: The ETC is embedded in the inner mitochondrial membrane, where electron
carriers pass electrons through protein complexes, pumping protons into the intermembrane
space to drive ATP synthesis via chemiosmosis.
