Question

A scientist was investigating a specimen in a laboratory. She is attempting to determine whether it is a virus or not. Which of the following would allow the scientist to decide that it is not a virus?

The specimen is extremely small

The specimen has organelles

The specimen contains DNA

The specimen has a protein coat
Question at position 21
21

Multiple Choice
3 points


Question at position 21

Viruses are -
Viruses are -

cellular

unicellular

multicellular

noncellular
Question at position 22
22

Multiple Choice
3 points


Question at position 22

Unlike cells, viruses do not -
Unlike cells, viruses do not -

metabolize

do homeostasis

all of these

grow
Question at position 23
23

Multiple Choice
3 points


Question at position 23

Which of the following is not involved in the lytic cycle?
Which of the following is not involved in the lytic cycle?

Attachment

Dormancy

Assembly

Penetration
Question at position 24
24

Multiple Choice
3 points


Question at position 24

Which of the following is not a characteristic of viruses?
Which of the following is not a characteristic of viruses?

Can only replicate inside a host cell

Has a protein coat

Contains cytoplasm and ribosomes

Contains DNA or RNA genetic material
Question at position 25
25

Multiple Choice
3 points


Question at position 25

Which of the following require a host cell because they are not able to make proteins on their own?
Which of the following require a host cell because they are not able to make proteins on their own?

bacteria

plant cells

viruses

animal cells
Question at position 26
26

Multiple Choice
3 points


Question at position 26

A variety of respiratory diseases in humans can be caused by adenoviruses. Which of the following describes the structure of an adenovirus?
A variety of respiratory diseases in humans can be caused by adenoviruses. Which of the following describes the structure of an adenovirus?

a prokaryotic cell that is propelled by a flagellum

a single cell that contains a cell membrane and a chromosome

a set of ribosomes that is held together by microtubules

a nucleic acid core that is surrounded by a protein coat
Question at position 27
27

Multiple Choice
3 points


Question at position 27


Which process is illustrated in the diagram?

Which process is illustrated in the diagram?

bacterial conjugation

facilitated diffusion

gamete formation

viral reproduction
Question at position 28
28

Multiple Choice
3 points


Question at position 28

For many years scientists debated whether viruses should be considered living organisms.
Which statement could a scientist use to support the position that viruses are not living?
For many years scientists debated whether viruses should be considered living organisms.
Which statement could a scientist use to support the position that viruses are not living?

Viruses replicate to produce more viruses.

Viruses require a host cell in order to reproduce.

Viruses infect both plant and animal cells.

Viruses have genes encoded in DNA.
Question at position 29
29

Multiple Choice
3 points


Question at position 29


Look at both cycles shown in the figure. During which cycle is the host cell destroyed?

Look at both cycles shown in the figure. During which cycle is the host cell destroyed?

lysogenic cycle

lytic cycle

both cycles

neither cycle
Question at position 30
30

Multiple Choice
3 points


Question at position 30

Which of these describes a pathogen that infects a human by injecting its DNA into a body cell?
Which of these describes a pathogen that infects a human by injecting its DNA into a body cell?

A virus that changes the way a cell works, causing the cell to make more viruses instead of performing its intended function.

A parasite that robs the cell of nutrients, interfering with organ functions.

A bacterium that creates a toxin that destroys the cell, keeping the cell from working in a normal manner.

A fungus that eats keratin found in skin cells, causing inflammation and interfering with the skin tissue's ability to protect.
Question at position 31
31

Multiple Choice
3 points


Question at position 31

A tomato plant in a greenhouse was found to be infected with tobacco mosaic virus. A few weeks later, nearby plants were also found to be infected with the virus.
Which of the following best describes how the virus reproduced?
A tomato plant in a greenhouse was found to be infected with tobacco mosaic virus. A few weeks later, nearby plants were also found to be infected with the virus.
Which of the following best describes how the virus reproduced?

The virus used the host plant's resources and machinery to reproduce.

The virus immediately killed the host plant and was free to reproduce.

The virus produced seeds in the tomatoes.

The virus made its own spores.
Question at position 32
32

Multiple Answer
3 points


Question at position 32

Select all the answers that are TRUE about viruses....(Choose 3)
Select all the answers that are TRUE about viruses....(Choose 3)

Viruses contain DNA/RNA

Viruses can reproduce on their own

Viruses are not alive

Viruses cannot reproduce on their own

Viruses have a nucleus

Answer 1

Sure! Here are the answers to the questions based on your provided queries:

**Question 21:** Which of the following would allow the scientist to decide that it is not a virus?
- **Answer:** The specimen has organelles.
(Viruses do not have organelles; they are noncellular and depend on host cells for replication.)

**Question 22:** Viruses are -
- **Answer:** noncellular.
(Viruses lack cellular structure, which is a characteristic of living organisms.)

**Question 23:** Unlike cells, viruses do not -
- **Answer:** all of these.
(Viruses do not metabolize, maintain homeostasis, or grow independently.)

**Question 24:** Which of the following is not involved in the lytic cycle?
- **Answer:** Dormancy.
(Dormancy is associated with the lysogenic cycle, not the lytic cycle.)

**Question 25:** Which of the following is not a characteristic of viruses?
- **Answer:** Contains cytoplasm and ribosomes.
(Viruses do not contain cytoplasm or ribosomes; they need a host cell for these processes.)

**Question 26:** Which of the following require a host cell because they are not able to make proteins on their own?
- **Answer:** viruses.
(Viruses rely on host cells to produce proteins.)

**Question 27:** Which of the following describes the structure of an adenovirus?
- **Answer:** a nucleic acid core that is surrounded by a protein coat.
(This is characteristic of viruses, including adenoviruses.)

**Question 28:** Which process is illustrated in the diagram?
- **Answer:** viral reproduction.
(Assuming the diagram illustrates viral reproduction, as it fits the context.)

**Question 29:** Which statement could a scientist use to support the position that viruses are not living?
- **Answer:** Viruses require a host cell in order to reproduce.
(This is a key point against considering viruses as living organisms.)

**Question 30:** During which cycle is the host cell destroyed?
- **Answer:** lytic cycle.
(In the lytic cycle, the host cell is indeed destroyed after viral replication and assembly.)

**Question 31:** Which of these describes a pathogen that infects a human by injecting its DNA into a body cell?
- **Answer:** A virus that changes the way a cell works, causing the cell to make more viruses instead of performing its intended function.
(This accurately describes a viral infection process.)

**Question 32:** Which of the following best describes how the virus reproduced?
- **Answer:** The virus used the host plant's resources and machinery to reproduce.
(Viruses require host cellular machinery to replicate.)

**Question 33** (Select all the answers that are TRUE about viruses—Choose 3):
- **Answer:**
1. Viruses contain DNA/RNA.
2. Viruses are not alive.
3. Viruses cannot reproduce on their own.
(Viruses do not have a nucleus and rely on host cells for reproduction, thus they are classified as non-living entities.)

Feel free to ask if you have any more questions or need further assistance!