Cell Biology - GCSE Quiz

Which statement is true of genes?

• 
  A gene is a short section of DNA that codes for a protein

• 
  A single molecule of DNA

• Humans have 46 genes

• It is a chromosome

Which statement is correct about the cells produced by mitosis?

• 
  Four daughter cells are produced, each has the same number of chromosomes as the parent cells

• 
  Two daughter cells are produced, each has the same number of chromosomes as the parent cells

• 
  Two daughter cells are produced, each has half the number of chromosomes as the parent cells

• 
  Two daughter cells are produced, each has twice the number of chromosomes as the parent cells

What happens in the stage that is just before mitosis in the cell cycle?

• 
  A period of DNA synthesis (DNA is replicated)

• 
  The cytoplasm separates

• 
  A period of growth, during which time DNA is checked for errors

• 
  A period of growth, during which mitochondria grow

Which statement about stem cells is correct?

• Embryonic stem cells can differentiate into different cell types

• 
  Adult stem cells can differentiate into any cell type

• 
  Bone marrow transplants use embryonic stem cells

• 
  Adult stem cells are only found in the brain

Which of the following is an ethical consideration about the use of embryonic stem cells?

• 
  In some cases embryos are being produced just so that stem cells can be extracted for research on therapies.

• 
  Transplants of stem cells from donors might transfer viruses to patients.

• 
  It is important to inform the public about the pros and cons of embryonic stem cell transplants.

Which statement is correct of plant stem cells?

• 
  Plant stem cells are identical in structure to animal stem cells

• 
  Plant stem cells are the elongated cells below the tip of the shoot

• Plant stem cells occur in meristems in the roots and shoots of plants

• 
  Plant stem cells can only differentiate into leaf cells

What is the function of a ribosome?

• 
  To release energy from glucose

• 
  Protein synthesis

• To build sugars by photosynthesis

• To store genetic information

If the actual size of a cell is 10 μm, and 10 mm in a book, what is the magnification of the image in the book?

• 10

• 100

• 1000

• 10,000

Which of the following is an advantage of the transmission electron microscope compared with the light microscope?

• Higher magnifications are possible with the transmission electron microscope

• 
  The transmission electron microscope has a lower resolution

• 
  The transmission electron microscope has a greater depth of field

• 
  The transmission electron microscope is safer

How is a muscle adapted to its function?

• 
  It contains protein filaments that slide over each other and cause contraction

• Muscular tissue has many nuclei

• Muscle cells have few mitochondria

• Muscle has a large surface area