Microscopy & Drawings — Past Paper Exam
Syllabus 0610 · Topics 2.2.3 & 2.3 · 15 Questions · 34 marks total
Total Marks
34
📋 Exam Instructions
Answer all questions. Show full working for all calculations. Use correct SI units. Attempt each question before revealing the answer. Click Examiner Trap to see common mistakes that cost students marks.
Section A
Drawing Rules
5
questions
Section B
Scale Bars
5
questions
Section C
Micrograph ID
5
questions
State two rules for making a biological drawing in an examination.
A student draws a cross-section of a leaf in an exam. She uses shading to show the darker palisade layer. State TWO errors she has made in her biological drawing technique.
Describe THREE features of a high-quality biological drawing, as assessed in Paper 6.
Which of the following is CORRECT practice when making a biological drawing in Paper 6?
Explain why shading is NOT permitted in biological drawings, even when it might make the diagram clearer.
A scale bar on a micrograph is labelled '2 μm'. You measure the scale bar with a ruler and it is 10 mm long. Calculate the magnification of the micrograph. Show your working.
Working space
Show your working step-by-step. Remember: measure in mm, then convert.
Under a light microscope, a student measures a cell to be 15 mm long in the image. The magnification stated is ×300. Calculate the actual size of the cell in micrometres (μm). Show your working.
Working space
Show your working step-by-step. Remember: measure in mm, then convert.
An electron micrograph shows a mitochondrion. The image of the mitochondrion measures 45 mm in length. The scale bar is labelled '3 μm' and measures 9 mm on the image. Calculate the actual length of the mitochondrion in μm. Show your working.
Working space
Show your working step-by-step. Remember: measure in mm, then convert.
A student measures a chloroplast on a micrograph. The image is 24 mm wide. The actual width of the chloroplast is 8 μm. What is the magnification?
State the formula for calculating magnification and explain why measurements in micrographs must always be taken in millimetres (mm) before converting.
On an electron micrograph of a plant cell, a very large, pale, central region with a single bounding membrane is visible. (a) Identify this structure. (b) State its function.
Dark, oval structures with a double membrane and visible internal folded membranes are present in an electron micrograph of an animal cell. (a) Identify these structures. (b) Name the internal folded membranes and state their purpose.
An electron micrograph shows a cell with: a large central nucleus, a cell wall, chloroplasts containing stacked internal membranes, and a permanent vacuole. (a) Is this a plant cell or an animal cell? Justify your answer with THREE pieces of evidence from the micrograph.
An electron micrograph shows a network of membrane-bound channels running through the cytoplasm, with small dark particles attached to its outer surface. What structure is being described?
A student examines a micrograph of a cell. She can see: a large, dense, irregular-shaped structure surrounded by a double membrane with pores; and many small, circular structures scattered throughout the cytoplasm. (a) Identify both structures. (b) Explain how the structures described are functionally linked.
Cambridge IGCSE Biology 0610
Microscopy & Biological Drawings
Syllabus topics 2.2.3 · 2.3 · Paper 6 Alternative to Practical
15
Questions
34
Total Marks
3
Sections
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