HelpContactFor teachers and institutes
>_StemPy Lab
Mock TestsClasses

>_StemPy Lab

Learn. Solve. Code the solutions. Test yourself.

Live examsFree mock exams, timed and rankedEveryone starts together, and your score and rank come the moment it ends.See the exams →

Learn

  • Physics
  • Chemistry
  • Mathematics
  • Biology
  • Python Programming
  • Statistics & Data Science
  • Classes
  • Groups

Practice

  • Problems
  • Quizzes
  • Mock Tests
  • Prepare for an Exam
  • Question Sets
  • Exams
  • Certificates
  • Python Labs
  • AI Practice Generator
  • Student-Created Tests

Community

  • Discussions
  • Resources
  • Notes
  • Blog

Account

  • Log in
© 2026 senLearn. All rights reserved.HelpAboutContactPrivacy PolicyTerms of UseRefund Policy
  1. Problems
  2. /Find the respiratory quotient from the equation…
EasyBiologyHigh School (11–12)Plant Biology › Respiration in PlantsNumericalA-LevelAPIB

Find the respiratory quotient from the equation…

StemPy LabContributed by StemPy Lab

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

Find the respiratory quotient from the equation.

  1. C6H12O6+6 O2⟶6 CO2+6 H2O\text{C}_6\text{H}_{12}\text{O}_6 + 6\,\text{O}_2 \longrightarrow 6\,\text{CO}_2 + 6\,\text{H}_2\text{O}C6​H12​O6​+6O2​⟶6CO2​+6H2​O
  1. 2 (COOH)2+O2⟶4 CO2+2 H2O2\,(\text{COOH})_2 + \text{O}_2 \longrightarrow 4\,\text{CO}_2 + 2\,\text{H}_2\text{O}2(COOH)2​+O2​⟶4CO2​+2H2​O
  1. Which of the two is a carbohydrate, and which is an organic acid?

Check your answer

Work it out on paper, then type your number. The answer itself stays hidden.

Need a reminder? The key ideaShowHide

RQ=volume of CO2 releasedvolume of O2 taken in\text{RQ} = \dfrac{\text{volume of CO}_2\ \text{released}}{\text{volume of O}_2\ \text{taken in}}RQ=volume of O2​ taken involume of CO2​ released​. It is 111 for carbohydrate, about 0.90.90.9 for protein, 0.70.70.7 for fat, and above 111 for organic acids. KOH takes in carbon dioxide, so the fall of volume in a tube with KOH is the oxygen taken in.

The worked solution

Have you tried it?

Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

Step 1. (a) RQ=66=1\text{RQ} = \dfrac{6}{6} = 1RQ=66​=1.

Step 2. (b) RQ=41=4\text{RQ} = \dfrac{4}{1} = 4RQ=14​=4.

Step 3. (c) Glucose is a carbohydrate. Oxalic acid is an organic acid.

Answer: 111 for glucose; 444 for oxalic acid. The organic acid has the RQ above 111.

Log in to save this for later
← All Problems
← PreviousA seed respires tripalmitin only. 2 C₅₁H₉₈O₆ + 145 O₂ longrightarrow 102 CO₂ + 98 H₂O; What is the… →
More onPlant Biology › Respiration in Plants

Discussion (0)

Log in to join the discussion.

Loading…

Learn it in

  1. The respiratory quotientBalance Sheet, Amphibolic Pathway and Respiratory Quotient

More on this topic

  1. Germinating seeds are kept in two closed tubes…Hard
  2. A lot of germinating seeds takes in 50 mL of oxygen and releases 44 mL of carbon dioxide…Hard
  3. A seed respires tripalmitin only. 2 C₅₁H₉₈O₆ + 145 O₂ longrightarrow 102 CO₂ + 98 H₂O; What is the…Medium
A young seed cell is making fatty acids for its membranes…Hard
  • A fatty acid has 16 carbon atoms. It is broken down completely into acetyl CoA, with 2 carbon atoms…Medium
    • All problems on this topic →