Checkpoint 1.2 - Viruses

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Email *

PERSONAL DETAILS

Full Name *

MULTIPLE CHOICE QUESTIONS

Generally, viruses are __________________

You may choose more than one answer

5 points

about 20-300 nm

are smaller than bacteria

are larger than bacteria

about 20-300 mm

All viruses consists of _______________

5 points

Genetic material and capsid

DNA and protein coat

DNA and RNA

single stranded RNA and Capsid

Clear selection

Which features shown in the diagram can be present in viruses?

5 points

1, 2 and 3

1, 2 and 4

1, 3 and 4

2, 3 and 4

Clear selection

The genetic materials of the virus can be

You may choose more than one answer

5 points

single stranded RNA

double stranded DNA

protein coat

lipid envelop

Which of the following statement is TRUE

5 points

All Viruses consist of genetic material and protein coat (capsid) only

All viruses have envelope of lipids that surrounds the protein coat

The genetic material made from either DNA or RNA

The genetic materials found in the core of the virus can be double stranded only

Clear selection

Which of the following statement is FALSE

You may choose more than one answer

10 points

The layer of envelop is synthesised by the virus inside the host cell.

Viruses have a simple cellular structure

Capsids protect viral nucleic acids from being hydrolysed and destroyed by host cells’ enzymes

Some viruses have a second protective layer known as the envelope

🔥 The functions of capsid include

You may choose more than one answer

10 points

to synthesise polypeptide in the host cell

attachment and injection of viral genome into the host

determines the antigenic specificity of virus

protect genetic material from nuclease attack

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

10 points

The specimen has cell wall

The specimen contains DNA

The specimen contains mitochondria

The specimen has a protein coat

Clear selection

Viruses are

5 points

facultative parasite

both free living and parasitic

free living

obligate parasites

Clear selection

🔥 Viruses largely lack metabolic machinery of their own to generate ATP or to synthesize ____________

You may choose more than one answer

10 points

Carbohydrate

Protein

Lipid

Nucleic acid

Why viruses cannot reproduce by itself?

5 points

Viruses reproduce asexually

The protein coat of virus is too rigid

Viruses do not have the complicated chemical machinery needed to reproduce

Viruses do not have genetic material to carry out reproduction

Clear selection

During _____1_____, viral coat protein interact with specific _____2_____ on the exterior of the host cell

5 points

1 = absorption, 2 = receptor protein

1 = adsorption, 2 = channel protein

1 = absorption, 2 = channel protein

1 = adsorption, 2 = receptor protein

Clear selection

The virus enters into the cells by __________________

5 points

receptor mediated endocytosis

receptor mediated exocytosis

active transport

passive transport

Clear selection

The virus travels to the appropriate location in the cell and expose its genome. Next, host-cell enzymes _____1_____ viral “early” genes into mRNAs and subsequently _____2_____ these into viral “early” proteins and enzymes

5 points

1 = transcribe, 2 = translate

1 = translate, 2 = transcribe

1 = hydrolyse, 2 = translate

1 = transcribe, 2 = synthesise

Clear selection

Which of the following statement is TRUE

5 points

Progeny viruses are assembled outside the host cell.

Enzymes that degrade the host-cell DNA, supplying amino acids for synthesis of viral DNA

The viral late proteins include capsid, assembly proteins and enzymes that degrade the host-cell DNA

Progeny virions are released when the cell is lysed by viral genetic materials

Clear selection

Send me a copy of my responses.

Submit

Clear form

Never submit passwords through Google Forms.

reCAPTCHA

Privacy Terms

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms