Skip to content

Home
Subjects
Past Papers
Key Terms

My Courses

Select your courses

Subjects

History
Geography
Biology
Chemistry
Physics
Mathematics

Resources

Browse Courses
Past Papers
Key Terms & Definitions
Pricing

About

Sign Up
Log In
Privacy Policy
Terms of Service

© 2026 GradeGen.AI

Not affiliated with any exam board.

Fine focus knob — OCR Biology B Definition | GradeGen.AI

Courses
Biology B
Key Terms
Fine focus knob

GCSEOCRJ257

Fine focus knob

Key term for OCR GCSE Biology B, used in Microscopy Techniques.

Definition

A smaller dial used for precision focusing to sharpen the detail of the image.

Exam Context

Fine focus knob appears in OCR GCSE Biology B revision content for Practical Skills, especially Microscopy Techniques and Example Activity.

Practical Skills Microscopy Techniques Example Activity

Found in Revision Notes

Practical Skills

Example Activity

Microscopy Techniques • Example Activity

Related Key Terms

Abiotic factor Abundance Acclimatize Accuracy

Revise Biology B with GradeGen.AI

Create a free account to access OCR GCSE Biology B revision notes, track progress, and practise related key terms.

Sign Up to Start Revising Log In

Activation energy

Aerobic respiration