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Biology 100 Exam – 2025/2026 | 100+ Verified Q&A on Photosynthesis, Cellular Respiration, DNA Replication, Calvin Cycle & Genetic Expression

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This 2025/2026 Biology 100 exam prep resource contains over 100 verified and A+ graded questions and answers. It focuses on high-yield topics including photosynthesis (C3, C4, CAM plants), aerobic and anaerobic respiration, energy pathways, light reactions, Calvin cycle, ATP production, oxidative phosphorylation, photorespiration, DNA replication, telomerase, enzyme functions, transcription, and translation. Perfect for students in introductory biology, life sciences, health sciences, pre-med, and biochemistry-related programs looking for reliable material for midterms or finals. Keywords: photosynthesis, cellular respiration, Calvin cycle, ATP synthesis, glycolysis, electron transport chain, DNA replication, telomerase, gene expression, transcription, translation, fermentation, C3 and C4 plants, CAM pathway, oxidative phosphorylation, photorespiration, enzyme function, genetic mutations, Hershey-Chase experiment, energy pathways

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Biology 100 2025/2026 Exam Questions
with Detailed Verified Answers (100%
Correct Answers) | Already Graded A+



Aerobic respiration is an _____ process which _____ carbon, while photosynthesis

is an _____ process that _____ carbon.exergonic ... oxidizes ... endergonic ...

reduces - 🧠 ANSWER ✔✔


You are looking a several living plant cells, some from the leaves, some from

fruits, some from the stems, and some from the roots. Which of the cells will have

functional mitochondria? - 🧠 ANSWER ✔✔All the cells (leaves, roots, stems, and

fruits) will have functional mitochondria

A C4 plant

The leaf cross section to the right belongs to what type of plant? - 🧠 ANSWER

✔✔A C4 plant


When would the Calvin cycle occur in the plant illustrated to the right? - 🧠

ANSWER ✔✔During the day only



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, Normal atmospheric conditions are 20% O and 22 2390 ppm CO . You expose C3

plants to different environments varying in CO and O conditions. Which

atmospheric conditions will show the lowest rate of photorespiration? - 🧠

ANSWER ✔✔10% O2 , 700 ppm CO2


You measure the photorespiration rates of a C3 and a C4 plant growing in normal

atmospheric conditions. You then reduce the oxygen concentration by half. Both

the C3 and the C4 plants will show a reduction in photorespiration. Which one will

show the greatest reduction in photorespiration? - 🧠 ANSWER ✔✔The C3 plant


In the late 1800's, a researcher named Engelmann was interested in how color of

light would affect photosynthesis. He shown while light through a prism to

separate it into different wavelength. This light was then absorbed by Spirogyra

algae. The algae released oxygen, 2w hich attracted bacteria (the more

photosynthesis = more O = more bacteria). Engelmann was able to tell what colors

of light stimulated the most photosynthesis by the amount of bacteria each color of

light attracted. Below are four possible results for the Engelmann experiment,

which is the actual result of his experiment? - 🧠 ANSWER ✔✔D high low high


When do CAM plants perform the Calvin Cycle? - 🧠 ANSWER ✔✔During the day




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PRIVACY STATEMENT. ALL RIGHTS RESERVED

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