ClassFactor
Question types

Four ways to test what you know

One upload becomes multiple-choice, true/false, written and case-based questions, each checked and cited.

  • MCQ with real distractors
  • True/false for quick sweeps
  • Written answers, graded
  • Case-based reasoning

Free to start · no credit card required

Quiz · 4 of 10 06:42

Which organelle produces most of the cell’s ATP?

ARibosome
BGolgi apparatus
CMitochondrion
DLysosome

Mix all four in one set

Multiple-choice

Which enzyme unwinds the DNA helix?

LigaseHelicasePrimasePolymerase

True / false

Mitosis produces four genetically distinct cells.

True False

Written

Explain why the heart can’t tetanize.

The long refractory period stops a new beat before relaxation…

Refractory period Mention Ca²⁺ plateau

Case-based

A 58-year-old presents with crushing chest pain and ST elevation in II, III and aVF.

Which artery is most likely blocked?

Quality checks

Every question passes three gates

1

Grounded

Written only from your material.

2

Judged

Weak and duplicate questions dropped.

3

Cited

Every answer links to its source.

Timed exams · every plan

Put your questions under the clock

Build a timed, auto-graded exam from the same material.

Free

Up to 20 questions

Pro

Pro

Up to 100

+ USMLE, MCAT & NCLEX styles

Explore timed exams
StandardSection 2 of 3
01:15

Question 14 of 40

A 24-year-old reports palpitations after starting a new medication. ECG shows a prolonged QT interval. Which ion channel is most likely affected?

AFast sodium channels
BL-type calcium channels
ChERG potassium channels
DFunny (If) channels
ENa⁺/K⁺ ATPase
Flag for reviewNext question

FAQ

Question types, answered

Multiple-choice, true/false, written (free response) and case-based questions — one type or a mix, from the same upload.

They’re written from your material, checked for quality before you see them, and cite the spot each answer came from.

You answer in your own words and get instant feedback against the key points from your source.

Yes. Free includes 25,000 credits to start, and each set shows its credit cost before you start. Pro gives 500,000 credits a month plus advanced AI models, and you can cancel any time.

Yes, on every plan. Free exams go up to 20 questions; Pro goes up to 100 and adds USMLE, MCAT and NCLEX question styles.

Study smarter. Reach your goals.

Upload your materials and get the tools, support, and structure you need to learn better, improve your grades, and stay on track.

Start free
  • No credit card required
  • Free to start
  • Study smarter. Improve your grades.