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🧬 Biology, NCEA

Years 11 to 13 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. Photosynthesis mainly takes place in which organelle?

RibosomeChloroplastMitochondrionNucleus

2. Natural selection is best described as

all individuals in a population change during their lifetimeindividuals with advantageous traits are more likely to survive and reproducespecies always evolve towards perfectionmutations are planned to help a species

3. The overall word equation for photosynthesis is

oxygen + water produce glucoseglucose produces alcohol + carbon dioxideglucose + oxygen produce carbon dioxide + water, releasing energycarbon dioxide + water, using light energy, produce glucose + oxygen

4. Which organelle contains the cell's genetic material (DNA)?

VacuoleChloroplastMitochondriaNucleus

5. Enzymes are best described as

molecules that only work outside cellsa type of carbohydrateproteins that are used up in every reactionbiological catalysts that speed up reactions without being used up

6. Which structure is found in plant cells but not in animal cells?

Cell wallNucleusMitochondriaCell membrane

7. In a dihybrid cross between two individuals heterozygous for two genes (AaBb x AaBb), the classic phenotype ratio in the offspring is

1:2:19:3:3:13:11:1:1:1

8. During transcription, which molecule is produced from a DNA template?

mRNAtRNAA proteinA new DNA strand

9. Why must gametes be haploid (half the normal chromosome number)?

so that offspring have double the normal chromosome numberso gametes can divide by mitosis afterwardsso that fertilisation restores the full diploid chromosome number in the offspringbecause haploid cells cannot mutate

10. A climax community in ecological succession is best described as

a relatively stable, long-lasting community that stops changing significantly unless disturbedan ecosystem in the middle of a firethe very first species to colonise bare grounda community with only one species

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