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Circulatory and Respiratory Systems – GK Quiz with Answers – Level 3

Advanced GK questions on heart chambers, single and double circulation, blood vessels, lymph, the path of oxygen into the blood and where glycolysis and aerobic respiration take place.

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Questions, answer key and solutions.

Questions
50
Duration
35 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 35-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
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Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 35 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Circulatory and Respiratory Systems GK Practice Quiz Level 3 for Biology

This Level 3 General Awareness quiz on Aptitude360 tests advanced biology concepts of the human circulatory and respiratory systems. It covers blood flow through the heart, blood components, blood vessels, breathing and cellular respiration. Most questions use statement-based, match-the-list and sequence formats, so you need exact factual recall rather than rough familiarity.

Topics covered in this circulation and respiration set

  • Path of blood through the atria and ventricles, starting from blood returning from the body
  • Single circulation in fish compared with double circulation in birds and mammals
  • Heart chambers across fish, amphibians, reptiles and humans
  • Roles of plasma, red blood corpuscles, platelets, haemoglobin and lymph
  • Features of arteries, veins and capillaries, and valves in the heart and veins
  • Blood pressure, hypertension and instruments such as the sphygmomanometer
  • Path of air from the nostrils to the alveoli, and the mechanics of breathing in
  • Sites and products of glycolysis, aerobic respiration and anaerobic respiration in yeast

Key concepts to revise for circulatory and respiratory system GK

  • Which side of the heart handles oxygen-rich blood and which handles de-oxygenated blood
  • Why ventricles have thicker muscular walls than atria
  • How plasma and haemoglobin share the transport of oxygen and carbon dioxide
  • The difference between glucose breakdown in the cytoplasm and pyruvate breakdown in the mitochondria

Revision tips for heart and breathing questions

  • Draw the heart once and trace the full route of blood, naming each chamber and vessel in order
  • Make a table comparing the aerobic breakdown of pyruvate in the mitochondria with its anaerobic breakdown in yeast, noting the products of each
  • For statement-based questions, check every word that describes a vessel wall, such as thick, thin or elastic

Who should take this Level 3 biology quiz

This quiz suits General Awareness aspirants who have already revised basic human physiology and now want to test it with tricky, exam-style statement questions.

FAQs about Circulatory and Respiratory Systems – GK Quiz with Answers – Level 3

How do the circulatory and respiratory systems work together?
The respiratory system takes oxygen into the alveoli of the lungs, where it passes into the blood. The circulatory system then carries this oxygen to body cells and brings carbon dioxide back to the lungs to be breathed out.
What is double circulation in humans?
In double circulation, blood passes through the heart twice in each complete cycle: once to go to the lungs and once to go to the rest of the body. This keeps oxygen-rich and oxygen-poor blood separate.
Where does gas exchange take place in the lungs?
Gas exchange takes place in the alveoli, which are tiny air sacs surrounded by capillaries. Oxygen moves into the blood and carbon dioxide moves out into the alveoli.
What is the difference between arteries and veins?
Arteries carry blood away from the heart and have thick, elastic walls. Veins bring blood back to the heart, have thinner walls and contain valves that stop blood from flowing backwards.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Circulatory and Respiratory Systems GK Level 35035 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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