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Grade 10 · Biology

Grade 10 Biology diagnostic

16 questions on plant biology, cells & microscopy, human biology & physiology, genetics & inheritance, evolution & biodiversity, ecology & populations and measurement & evidence, plus 2 from Grade 9. Answer what you can, then check your answers to see which topics are secure and what to practise next.

16 questions7 topicsAbout 20 minutesSet 1 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Plant biologyA simplified equation uses 6 CO₂ to represent formation of one glucose molecule. How many carbon atoms are supplied?
2Plant biologyMust pollination always be carried out by insects?
3Cells & microscopySupplied plant-tissue data show initial mass 12 g and final mass 12.1 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.
%
4Cells & microscopyWhich structure is found in plant cells but not in animal cells: the chloroplast or the ribosome?
5Human biology & physiologyA fictional circulation model has 93 beats/min and 60 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.
mL/min
6Human biology & physiologyWhich is part of many chemical synapses?
7Genetics & inheritanceA DNA template strand reads TATAGCAC. Which mRNA sequence is transcribed from it, read base by base in the same order?
8Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 172 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.
9Evolution & biodiversityIn natural selection, what evolves?
10Evolution & biodiversityIs the same trait necessarily advantageous in every environment?
11Ecology & populationsA supplied survey counts 47 plants in 9 non-overlapping quadrats, each 0.25 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².
plants/m²
12Ecology & populationsA supplied food-web model transfers 7% of 646 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
kJ
13Measurement & evidenceInvestigation: Yeast is mixed with sugar water at 20 °C, 30 °C and 40 °C, using the same mass of sugar each time, and the gas bubbles released per minute are counted. In this investigation, which is a controlled variable?
14Measurement & evidenceDo ten readings of one plant equal ten independently grown plants?

From Grade 9

These questions check skills from the grade below, so gaps can be spotted early.

15Plant biology (Grade 9)In supplied data, 12 of 78 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%
16Plant biology (Grade 9)In supplied data, 28 of 56 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%