National 5 (Scotland) · National 5 Biology
Cell Biology and Multicellular Organisms
34 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 34 questions
- Which cell structure controls the activities of an animal cell and contains the genetic material?
- Which structure is found in a plant cell but not in an animal cell?
- What is the function of ribosomes?
- Yeast is a single-celled fungus. Which feature do its cells share with plant cells but not with animal cells?
- Bacterial cells differ from animal cells because bacterial cells
- What is diffusion?
- Which process explains how water moves into a root hair cell?
- A potato cylinder is placed in a concentrated salt solution. After an hour it has become shorter and softer. What has happened?
- Which statement about active transport is correct?
- Which row correctly shows the pairing of DNA bases?
- One strand of DNA has the base sequence A T T G C. What is the sequence of the complementary strand?
- What does a gene code for?
- An enzyme works best at 37 °C and loses activity at 70 °C. What is the reason?
- The graph of enzyme activity against pH peaks at pH 2 for pepsin. In which part of the body does pepsin work?
- Which row shows the correct products of the enzyme catalase acting on hydrogen peroxide?
- Which of the following is the word equation for aerobic respiration?
- Which molecule is made during respiration and acts as the energy currency of the cell?
- During hard exercise muscle cells run short of oxygen. What is produced?
- Which row shows the word equation for photosynthesis?
- What are chloroplasts used for in a plant cell?
- A student placed pondweed in water at different distances from a lamp and counted bubbles. What is the independent variable?
- Plant cells in a root meristem are dividing. Which type of cell division is this?
- A human skin cell has 46 chromosomes. How many chromosomes are in each daughter cell after mitosis?
- What is a stem cell?
- Bone marrow stem cells can be given to a patient with leukaemia. What is the aim?
- Which hormone lowers blood glucose concentration after a meal?
- What does glucagon do?
- A person with Type 1 diabetes cannot make enough insulin. How is the condition managed?
- Which type of neurone carries impulses from the central nervous system to a muscle?
- Put the reflex arc in the correct order.
- What is the small gap between two neurones called?
- A synapse can only pass an impulse in one direction. Why?
- A gene has two alleles: B (dominant, brown eyes) and b (recessive, blue eyes). A person has the genotype Bb. What is their phenotype?
- Two heterozygous brown-eyed parents (Bb × Bb) have children. What is the probability that a child has blue eyes (bb)?
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