Molecules of Life II/Cells Week 3

Question 1

Which of the following is NOT true of mitochondria?

They divide independent of the nucleus.
They have double membranes.
They function independent of the nucleus.
They have their own genes.

Answer 1

They function independent of the nucleus.

Question 2

Which of these is NOT a component of the cytoskeleton?

Actin filaments
Microtubules
Intermediate filaments
Fibrin

Answer 2

Microtubules

Question 3

All eukaryotic cells have the following EXCEPT _____________

Plasma membrane
Cell wall
Cytoplasm
Nucleus

Answer 3

Cell Wall

Question 4

Which of these is NOT a characteristic of enantiomers?

They have the same empirical formulas.
They are mirror images of each other.
They form chiral structures.
They have the same arrangements in space.

Answer 4

They have the same arrangements in space.

Question 5

Which of the following components of the cell theory is in line with the theory of evolution?

Cells are either prokaryotic or eukaryotic.
All living things are made of cells.
Cells are the basic unit of life.
Cells arise from pre-existing cells

Answer 5

Cells arise from pre-existing cells

Question 6

Which of the following is True of prokaryotic cells?

They have membrane enclosed nucleoid.

They have ribosomes for protein synthesis.
They have functional structures that isolates reactions.
They have extensive endomembrane system

Answer 6

They have ribosomes for protein synthesis.

Question 7

Which of these statements about bacteria cell wall is FALSE?

All bacteria have cell wall.
All bacteria cell wall are made up of peptidoglycan.
All bacteria cell wall protects the cell.
All bacteria cell wall gives shape to the cell.

Answer 7

All bacteria have cell wall.

Question 8

The space in eukaryotic cells where the largest cytoskeletal elements are assembled is known as ____________.

Centrosomes

Centrioles
Cytosol
Cisternal space

Answer 8

Centrosomes

Question 9

If you want to observe internal structures of a specimen that are 1nm apart, the microscope that will give you the best results is _______________.

Con-focal microscope
Phase contrast microscope

Transmission electron microscope
Scanning electron microscope

Answer 9

Transmission electron microscope

Question 10

If a cell is secretory in its primary function, which of the following do you expect to be in high numbers in the cell? ___________________

Lysosomes
Smooth endoplasmic reticulum
Rough Endoplasmic reticulum
Nucleus

Answer 10

Rough Endoplasmic reticulum

Question 11

9 + 2 arrangements of microtubules is present in _________________.

cilia of prokaryotes and eukaryotes
cell wall of prokaryotes

flagella of eukaryotes
flagella of prokaryotes

Answer 11

flagella of eukaryotes

Question 12

Which of these is absent in RNA?

Adenine
Thymine
Cytosine
Uracil

Answer 12

Thymine

Question 13

Numerous short fingerlike projections on the surface of bacteria cells that are used for movement are likely to be _______________.

cilia
pilus
flagella
slime

Answer 13

cilia

Question 14

Which of these help extra cellular matrix to connect to cytoskeleton?

Integrins
Cell walls
Filament
Glycoproteins

Answer 14

Integrins

Question 15

Which of these is NOT a component of the cytoskeleton?

Actin filaments

Fibrin
Microtubules
Intermediate filaments

Answer 15

Fibrin

Question 16

Which of the following is NOT true of the cytoskeleton in eukaryotes?

They help with cell movement.

They are stable and static.
They keep organelles fixed in the cell.
They give shape to the cell.

Answer 16

They are stable and static.

Question 17

One of the largest compartments inside eukaryotic cells is found in the ______________.

Chloroplast
Nucleus
Rough ER
Microtubules

Answer 17

Rough ER

Question 18

According to the endosymbiotic theory the nucleus of eukaryotic cells could have evolved from ________________.

Bacteria cell only
Bacteria or achaean cell
Archaean cell only
Proteobacteria

Answer 18

Bacteria or achaean cell

Question 19

The following is true of functional groups EXCEPT_________________.

each group has unique properties.
influencing the behavior of some component of the molecule.
retaining characteristics irrespective of where they are attached.
bonding to carbon-hydrogen backbone.

Answer 19

influencing the behavior of some component of the molecule.

Question 20

Which of these statements is NOT true?

Prokaryotic cells have DNA.
Prokaryotic cells have no membrane-bound organelles.
Prokaryotic cells have ribosome
Prokaryotic cells have cytoplasm.

Answer 20

Prokaryotic cells have no membrane-bound organelles.

Question 21

The main difference between bacteria microcompartments and eukaryotic compartments is in _________________

how they function generally.
how they isolate metabolic reactions
how they are structured.
how they store cellular products.

Answer 21

how they are structured.

Question 22

Which of these is true of the hydrogen bonds between nitrogenous bases of nucleotides?

Cytosine and Adenine form two bonds.
Purines sometimes pair with other purines.
Guanine and Cytosine bonds use the most energy.
Adenine and Thymine form three bonds.

Answer 22

Guanine and Cytosine bonds use the most energy.

Question 23

Which of the following cells will be most efficient if they all have a spherical shape.

A cell of radius 2 micrometers.
A cell of radius 9 micrometers.
A cell of radius 6 micrometers.
A cell of radius 4 micrometers.

Answer 23

A cell of radius 2 micrometers