Biology CH 2: part 1

Question 0

viruses

Scientist consider viruses non living because they

Answer 0

Don’t exhibit all the criteria of life. ( no respiration, grow, or develop) all viruses can do is replicate (making copies) but not without a host cell.

Question 1

viruses

____ are composed of nucleic acids enclosed in a protein coat and are smaller than the smallest bacterium.

Answer 1

Viruses

Question 2

viruses

____ cell in which a virus replicates

Answer 2

Host cell

Question 3

viruses

Viruses named after

Answer 3

The disease they cause , or the organ or tissue they affect.

Question 4

viruses

A virus that infects a bacterium is called a ____

Answer 4

Bacteriophage

Question 5

viruses

Inner for of a virus is made up of

Answer 5

Nucleic acid ( RNA or DNA) aka genetic material ( instructions for making copies)

Question 6

viruses

Outer core of a virus is made up of

Answer 6

A capsid (determines shape if virus)or even an envelop ( phosolipid)

Question 7

viruses

Outer protein coat …

Answer 7

Capsid

Question 8

viruses

Lytic cycles steps are

Answer 8

Attachment, entry (inject nucleic acid), replication , assembly, lysis and release, again….

Question 9

viruses

Lysogenic cycle steps are

Answer 9

Attachment, entry, provirus formation(provirus become part of host chromosome), cell division (hides in chromosome)…. Lytic

Question 10

viruses

Viral DNA that is integrated into the hosts cells chromosome is called _____.

Answer 10

Provirus

Question 11

viruses

Herpes, chicken pox, and cold sores are ______

Answer 11

Lysogenic

Question 12

viruses

Measles, Shingles, aids are ____.

Answer 12

Lytic

Question 13

viruses

Bursting of a cell____

Answer 13

Lysis

Question 14

viruses

What is the active transport process by which material are expelled from a cell, releases new viruses from the host cell.

Answer 14

Exocytosis

Question 15

viruses

The RNA virus with the most comples replication cycles is the ___

Answer 15

Retrovirus

Question 16

viruses

_____, an enzyme it carries inside the capsid. (helps produce double strand DNA from the viral DNA.

Answer 16

Reverse transcriptase

Question 17

viruses

Viruses may have originated from ___

Answer 17

Their host cells

Question 18

viruses

Viruses infect ___ ______

Answer 18

All organisms

Question 19

viruses

Viruses may have evolved with life as

Answer 19

Prices of cellular DNA/RNA that became independent and could move cell to cell.

Question 20

viruses

HIV

1. specific for_____
2. is a ______

Answer 20

White blood cells

Retrovirus

Question 21

viruses

____ is a small misfolded protein which alters normal protein structures.

Answer 21

Prion

Question 22

viruses

_____ “naked” RNA fragments that infect plants

Answer 22

Viroid