OCR A-Level Biology A (H420) · OCR H420
2 Foundations in biology
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Foundations in biology
- Describe the differences in the structure and function of starch and cellulose, explaining… (4 marks, Describe)
- Compare the role of the nucleus and the mitochondria in a eukaryotic cell, explaining how … (4 marks, Compare)
- A student observes two types of cells under an electron microscope: a mesophyll cell from … (4 marks, Explain)
- A student examined two types of cell under an electron microscope and noted that one cell … (4 marks, Explain)
- Explain why a cell with a large number of mitochondria and an extensively folded inner mit… (4 marks, Explain)
- Explain why a cell with a higher surface area to volume ratio is able to rely on diffusion… (4 marks, Explain)
- Explain why a molecule of messenger RNA (mRNA) produced during transcription is described … (4 marks, Explain)
- Explain why the resolution of a transmission electron microscope (TEM) is far greater than… (4 marks, Explain)
- Explain why a strand of mRNA produced during transcription is complementary to, but not id… (4 marks, Explain)
- Explain why the tertiary structure of an enzyme is essential for its function, referring t… (4 marks, Explain)
- A student investigates the activity of the enzyme catalase, which breaks down hydrogen per… (4 marks, Explain)
- Explain why the tertiary structure of an enzyme is essential for its function, referring t… (4 marks, Explain)
- A student claims that competitive inhibitors always reduce the rate of an enzyme-controlle… (4 marks, Explain)
- Explain why the tertiary structure of an enzyme is essential for its function, and describ… (4 marks, Explain)
- Explain why a cell in the metaphase of mitosis has twice the DNA content of a cell that ha… (4 marks, Explain)
- A student investigates the effect of increasing substrate concentration on the rate of an … (4 marks, Explain)
- A student investigates the effect of a competitive inhibitor on the rate of an enzyme-cont… (4 marks, Explain)
- Explain why the phospholipid bilayer acts as a selective barrier, allowing some molecules … (4 marks, Explain)
- Explain why cells in the meristem of a plant root tip have a higher proportion of cells in… (4 marks, Explain)
- Explain why cells in the meristem of a plant root tip divide by mitosis rather than meiosi… (4 marks, Explain)
▶ Practise Foundations in biology with instant AI marking (free) →