At this point had scientists discovered viruses?

No, they named it tobacco mosaic disease not tobacco mosaic virus

Yes, they named it tobacco mosaic disease which is the same as tobacco mosaic virus

Does a healthy undamaged leaf easily "catch" a virus

No, the leaf needs to be broken or damaged first to allow the virus to pass through the waxy lipid layer

Yes, a healthy leaf can easily become contaminated with a virus

Heating the virus for several hours stops infections. How could this be related to enzymes?

The virus uses an enzyme protein to enter cells and at high temperatures this protein is denatured.

This has nothing to do with enzymes

What happens when an enzyme is denatured?

the enzyme causes chemical reactions to speed up even faster

How are viruses and cells different?

cells reproduce independently. viruses require a host to reproduce.

cells are only protein. viruses are only carbohydrates.

viruses have protein membranes. cells have nucleic acid membranes.

cells and viruses are the same.

Viruses are considered to be nonliving because

they cannot reproduce on their own

they can reproduce on their own

Which statement regarding viruses is true?

a virus can only reproduce inside a living cell

viruses are generally larger than cells

When does infection begin?

When a virus makes connection with a cell

Why are the proteins on the virus described as keys?

the proteins evolved into the perfect shape and size to "unlock" specific cell receptors

The proteins can unlock every lock type like a key

2015 STAAR: How are glycoproteins from the HIV virion and the cilia of an animal cell different?

glycoproteins are used for attachment. Cilia are used to move fluids outside the cell.

Glycoproteins are used to obtain nutrition. Cilia are used to secrete proteins.

Glycoproteins are used to provide physical support. Cilia strengthen the cell membrane.

Glycoproteins are used for defense. Cilia are used for locomotion.

2013 STAAR: A virus is shown. What do the projections on the outside do?

help a virus attach to a host cell.

help a virus move inside a host cell.

help a virus control a host cell's DNA.

signal other viruses to infect a host cell.

2016 STAAR: The picture shows a model of a virus called a bacteriophage. Bacteriophages can infect bacteria such as E. coli. In what way are the bacteriophage and E. coli alike?

they both lack membrane bound organelles

2017 STAAR: Once a virus gains entry to the body, a virus invades a host cell in order to -

access cellular processes for replication

deactivate the host cell's defenses

synthesize antibodies for defense

metabolize host proteins and grow

2022 STAAR: Which statement best describes how a virus replicates?

a virus enters a host cell and uses the materials from the host cell to produce new virus particles

A virus divides into two identical cells before infecting the host cell

multiple viruses fuse and form a large particle that breaks apart, release new virus particles

multiple virus particles break down in component parts, which then reassemble into new copies of the virus

Jordan Butler Virus Lesson

Interactive Video

•

Biology

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-LS2-7, HS-LS1-1

Standards-aligned

Jordan Butler

Used 9+ times

FREE Resource

35 questions

Show all answers

SLIDE QUESTION

30 sec • Ungraded

SLIDE QUESTION

30 sec • Ungraded

SLIDE QUESTION

30 sec • Ungraded

SLIDE QUESTION

30 sec • Ungraded

SLIDE QUESTION

30 sec • Ungraded

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why were scientists trying to research this new disease of tobacco plants?

Tobacco plants were considered valuable as legal tender and by becoming diseased farmers were losing money

Scientists didn't have a lot to do in the 1870s and this was a great way to look busy

Tobacco companies were paying scientists A LOT of money to find a way to get rid of this disease

SLIDE QUESTION

30 sec • Ungraded

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