Review: 1A.4, 1C.1 - 1C.3

 Which characteristic supports the classification of a virus as nonliving?

• Viruses can only multiply within a living cell.

• Viruses are too small to be seen with the naked eye.

• Viruses lack membrane-bound organelles.

• Viruses will typically die if their hosts die.

Which organism could be considered nonliving because it cannot carry out all the functions of life on its own as described in the cell theory?

• a virus

• a multicellular algae

• a unicellular algae

• a prokaryote

The inner membrane of a mitochondrion is folded over many times in order to increase surface area.  What would happen if the number of folds were decreased?

• The amount of ATP produced would increase.

• The amount of ATP produced would decrease.

• The amount of glucose produced would increase.

• The amount of glucose produced would decrease.

   

Prokaryotic cells are generally smaller in size than eukaryotic cells. Because of this, the prokaryotic cells have more surface-to-volume ratio than the eukaryotic cells.  How is this feature advantageous to the prokaryotic cells?

• It helps them to reproduce asexually.

• It helps them to maintain a definite body structure.

• It helps them to produce energy in the absence of oxygen.

• It helps them to respond rapidly to changing environmental conditions.

A scientist observing a cell under a microscope observes that the cell has many organelles, is surrounded by a cell wall, and produces oxygen. What prediction can be made about this cell?

• This is a plant cell that was found in a leaf.

• This is a plant cell that was found in a root.

• This is an animal cell that was found in blood.

• This is an animal cell that was found in muscle.

What structure can be found in both a virus and a cell?

• nucleic acid chain

• endoplasmic reticulum

• nuclear membrane

• nucleus

Which structure does a virus have in common with a prokaryotic cell?

• cell wall

• nucleic acid

• ribosome

• capsid

Which feature of viruses is the most similar to a feature of living things?

• Viruses do not grow or develop.

• Viruses have a way to reproduce new viruses.

• Viruses have a basic structure that is not based on cells.

• Viruses require host cells in order to be active.

A biology class is debating whether or not viruses are living things. Which accurate and logical argument defends the position taken?

• Viruses are living because they maintain homeostasis.

• Viruses are living because they use host cells to make copies of themselves.

• Viruses are not living because they have no cellular organization or metabolic processes.

• Viruses are not living because they do not have any characteristics of living things.

Observe the structure of the plasma membrane. What is the identity of the molecule labeled Y?

• cholesterol

• nucleotide

• phospholipid

• protein