Cell Structure

1.

1 point

Which of the following structures does Escherichia coli have?
I. 70S Ribosomes
II. Pili
III. Nucleus

I only

I and II only

II and III only

I, II, III

2.

1 point

What feature do plant cells have but not animal cells?

Plasma membranes

Mitochondria

Cell walls

80S ribosomes

3.

1 point

A red blood cell is 8 μm in diameter. If drawn 100 times larger than its actual size, what diameter will the drawing be in mm?

0.08 mm

0.8 mm

8 mm

80 mm

4.

1 point

What can the extracellular matrix of cells be made of?
I. Polysaccharide
II. Glycoprotein
III. Phospholipid

I only

I and II only

II and III only

I and II only

5.

1 point

Which of the following structures are present in both plant and animal cells?
I. Cell wall
II. Chloroplast
III. Mitochondrion

I only

I and II only

I and III only

III only

6.

1 point

Which functions of life are found in all unicellular organisms?

growth, response and nutrition

differentiation, response and nutrition

metabolism, meiosis and homeostasis

growth, metabolism and differentiation

7.

1 point

Which function is carried out by the flagellum of prokaryotes?

Movement of food towards the cell

Movement of the whole cell from one place to another

Movement of naked nucleic acid inside the cell

Movement of water around the cell to speed up gas exchange.

8.

1 point

If a mitochondrion has a length of 5 µm and a student’s drawing of the mitochondrion is 10 mm, what is the magnification of the drawing?

×0.0005

×0.5

×200

×2000

9.

1 point

What do prokaryotic cells have that eukaryotic cells do not?

Mitochondria

70S ribosomes

Histones

Internal membranes

10.

1 point

In which of the following cells can more than one nucleus be found?

An unfertilized egg

Neuron

Sertoli cell

Muscle fibre

11.

1 point

Which of the following structures are found in all cells?

Mitochondria

Cell walls

Chloroplasts

Ribosomes

12.

1 point

Which of the following characteristics found in a structure necessarily indicates that it is alive?

The presence of genetic material

The presence of a lipid bilayer

Metabolism

Movement

13.

1 point

A cell has cytoplasm, a cell wall, naked DNA and ribosomes. Based on this information, what type of cell could this be?

A cell from a pine tree

A grasshopper cell

A human red blood cell

A bacterium

14.

1 point

If a Sequoia sempervirens tree is 100 m tall and a drawing of it is 100 mm tall, what is the magnification of the drawing?

×0.001

×0.1

×1.0

×1000

15.

1 point

Which ratio limits the size of cells?

The rate of metabolism to mass

The surface are to volume

The mass to volume

The surface area to mass

16.

1 point

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.

I only

II only

I and III only

I, II and III

17.

1 point

What is the correct order of increasing size for the following biological structures?
I. The width of a virus
II. The width of a bacterium
III. The thickness of a cell surface membrane
IV. The diameter of a eukaryotic cell

I → III → II → IV

I → III → IV → II

III → I → II → IV

III → II → I → IV

18.

1 point

In viewing an electron micrograph of a cell, ribosomes, pili and a single circular chromosome are observed. What other structure is likely to be present?

The rough endoplasmic reticulum (rER)

Mitochondria

A nuclear membrane

A plasmid

19.

1 point

What happens as a cell grows larger?

The surface area to volume ratio increases

The surface area to volume ratio increases The metabolic rate of the cell increases

Heat exchange becomes more efficient

Materials are not absorbed quickly enough for the cell’s needs

20.

1 point

By what process do most bacteria divide?

Mitosis

Meiosis

Conjugation

Binary Fission