Week 4: Weekly Quiz

Question 1

Viruses only start to mutate when they “jump” to a new host.

True
False

Answer 1

False

Question 2

a. ) Determine h and k, then calculate the Triangulation Number of the virus structure. Show your math for full credit. (2 pts.)
b. ) Calculate the number of subunits needed to build this capsid. Show your math for full credit. (2 pts.)

Answer 2

Refer to Ipad
A. H = 1 ; K =1
T = H2 + HK + K2

T = 12 +(1)(1) + 12 = 3

B. Capsid size = 60 * T
= 60 * 3 = 180 subunits

Question 3

Observe the virus structure below.
This type of structure is characterized by:

Any of these answers

Icosahedral symmetry

Complex symmetry

Helical symmetry

Answer 3

Helical Symmetry

Question 4

Cladogram vs Phylogram

Answer 4

Cladogram has even branches

Question 5

The accumulation of mutations over time due to random chance is best characterized as:

None of the above

Natural selection

Metastability

Genetic Drift

Genetic Shift

Answer 5

Genetic Drift