[Maximum number: 1]
Which statement is part of the cell theory?
A
All cells have a cell wall.
B
Every cell shows emergent properties.
C
Every cell carries out all the functions of life.
D
All cells come from pre-existing cells.
Question rangeA2.2.1—Cells as basic structural unit
[Maximum number: 1]
Which of the following will contribute to the cell theory?
I. Living organisms are composed of cells.
II. All cells come from pre-existing cells by mitosis.
III. Cells are the smallest units of life.
A
I only
B
II only
C
I and III only
D
I, II and III
[Maximum number: 1]
What evidence supports the cell theory?
A
Living organisms are made up of cells.
B
Unicellular organisms carry out all the functions of life.
C
Multicellular organisms show emergent properties.
D
Cells can develop from inorganic molecules.
[Maximum number: 1]
Which statement is part of the cell theory?
A
Cells are composed of organic molecules.
B
Cells have DNA as their genetic material.
C
Cells have cytoplasm surrounded by a membrane.
D
Cells come from pre-existing cells.
[Maximum number: 1]
Which property of cells is evidence for the cell theory?
A
Cells have proteins.
B
Cells can divide.
C
Cells have nucleic acids.
D
Cells can move around.
(a)
Outline the cell theory.
[ 2 ]
(b)
(i)
Annotate the electron micrograph of the Escherichia coli cell with the function of the structures labelled I and II.
[ 2 ]
(ii)
Calculate the magnification of the electron micrograph.
[ 1 ]
(a)
Outline the cell theory.
[ 2 ]
(b)
(i)
Annotate the electron micrograph of the Escherichia coli cell with the function of the indicated structure.
[ 1 ]
(ii)
Calculate the magnification of the electron micrograph.
[ 1 ]
(c)
Explain the role of the following enzymes in DNA replication.
[ 4 ]
(i)
Helicase
[ 1 ]
(ii)
DNA polymerase III
[ 1 ]
(iii)
RNA primase
[ 1 ]
(iv)
DNA ligase
[ 1 ]
(a)
Outline the cell theory.
[ 2 ]
(b)
State two functions of life.
[ 2 ]
(c)
List three characteristics of eukaryotic homologous chromosomes.
[ 3 ]
(d)
Using the following table, compare and contrast anaerobic cell respiration in yeasts and in humans. The first row has been completed as an example.
[ 3 ]