Cells and Viruses Review

Cells and Viruses Review

Multiple Choice

What type of cell is this?

• Eukaryotic

• Prokaryotic

Multiple Choice

What type of cell is this?

• Eukaryotic

• Prokaryotic

Multiple Choice

A single-celled organism can be classified as a prokaryotic based on the absence of-

• a cell membrane

• ribosomes

• chromosomes

• a nucleus

Multiple Choice

Plant or animal cell?

• Plant

• Animal

Multiple Choice

Plant or animal cell?

• Plant

• Animal

Multiple Choice

Which table headings should the student use for the two groups?

• 1.Animal cells

  2. Plant cells

• 1.Prokaryotic cells

  2. Eukaryotic cells

• 1.Mobile cells

  2. Motile cells

• 1.Fungal cells

  2. Bacterial cells

Multiple Choice

Large molecules like glucose pass the cell membrane using

• osmosis

• ATP energy in active transport

• passive transport (no energy)

Multiple Choice

Cell membranes keep a stable environment in the cell called-

• photosynthesis

• homeostasis

• plasma membrane

• transport

Multiple Choice

Molecules move from a high concentration gradient to low concentration gradient, requiring no energy during

• passive transport

• active transport

Multiple Choice

Which two processes does this diagram most directly model?

• Energy conversions and synthesis of new molecules

• Synthesis of new molecules and homeostasis

• Transport of molecules and energy conversions

• Homeostasis and transport of molecules

Multiple Choice

Which description best identifies this type of cellular transport?

• Active transport, because energy is being used to move molecules against the concentration gradient.

• Facilitated diffusion, because energy is being used to move molecules with the concentration gradient

• Osmosis, because energy is not being used to move molecules with the concentration gradient

• Endocytosis, because energy is not being used to move molecules against the concentration gradient

Multiple Choice

Students observe the changes in eggs that were placed in different solutions. The egg in water solution, gained a little volume. The egg in high sugar solute solution, shrank. Which statement best describes the role of the cell membrane?

• The cell membrane is an impermeable barrier that prevents water from entering the cell

• The cell membrane allows solutes to enter the cell, which causes the cell to shrink.

• The cell membrane allows water to enter and leave the cell.

• The cell membrane removes solutes from the environment.

Multiple Choice

Which of the following describes the difference between viruses and cells?

• Cells contain protein and viruses contain only carbohydrates

• Viruses have flagella and cells only have cilia

• Cells reproduce independently and viruses require a host to reproduce

• Viruses have membranes made of proteins and cells have membranes made of nucleic acid

Multiple Choice

The picture shows a 3D model of a virus called A bacteriophage, bacteriophages can infect bacteria such as E coli. In what way are bacteria and E coli alike ?

• They contain antibodies.

• They reproduce by mitosis

• They have identical genomes

• They lack membrane-bound organelles

Multiple Choice

Hoof and mouth disease in livestock is caused by a microscopic infectious particle. It was discovered that this particle requires a host cell to reproduce. Which pathogen is most responsible for causing this disease in livestock?

• A bacterium because it is contagious

• A fungus because it infects livestock

• A protist because it is microscopic

• A virus because it requires a host cell to reproduce

Multiple Choice

A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane (nucleus) found in animal cells. Which of these describes the similar functions of capsids and nuclear membranes (nucleus)?

• Both transport proteins through the structure.

• Both provide energy for activities in the structures.

• Both protect genetic information for the structures.

• Both code for the proteins needed for the

  reproduction of the structures.

Multiple Choice

A photograph of a virus is shown below the red projections on the surface of this virus allow the virus to-

• move inside a host cell

• attach to a host cell

• control a host cell's DNA

• signal other viruses to infect

  a host cell

Multiple Choice

Viruses can be transmitted through air, water, food, insect bites and direct skin contact, once a virus gains entry to the body it invades a host cell in order to-

• deactivate the host cell's defenses

• synthesize antibodies for defense

• metabolize host proteins and grow

• access cellular processes for replication

Symptoms occur within hours to weeks !! You get sick quick!

Symptoms occur months to years later!!

Multiple Choice

Severe acute respiratory symptom (SARS) is an illness caused by a coronavirus. Symptoms include a high fever headaches and body aches typically occur 2 to 7 days after infection by the virus. SARS is more serious in elderly patients. The information suggests that the reproductive cycle of the SARS virus is-

• lysogenic, because the virus is a Coronavirus

• lytic, because the virus causes respiratory illness

• lysogenic, because the virus primarily affects older people

• lytic, because the onset quick onset of symptoms after infection

Multiple Choice

A person infected with the human immunodeficiency virus HIV may not have any symptoms for a period Of time during this time the virus affects the body by doing which of the following?

• The virus produces toxins that weaken immune cells and prevent them from reproducing

• The virus damages immune cells while using their Machinery to produce copies of itself

• The virus uses nutrients meant for immune cells to fuel its own cellular respiration

• The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally