Question

question 5 (1 point) ✓ saved
a fomite is that can transmit disease.
o a vector
o an animal
o an inanimate object
o a cough or sneeze droplet
question 6 (1 point) ✓ saved
a change in dna sequence arising from errors in replication that occur randomly is
a(n)
o spontaneous mutation.
o induced mutation.
o point mutation.
o nonsense mutation.
question 7 (1 point) ✓ saved
the lactose operon itself has three important features. which of the following is
not one of these features?
o the regulator
o the control locus
o the inducer
o the structural locus

Explanation:

• Question 5: A fomite is defined as an inanimate object (e.g., doorknobs, utensils) that can carry and transmit pathogens. Vectors are living organisms (like mosquitoes) that transmit disease. Animals (unless acting as vectors) and cough/sneeze droplets (which are biological particles, not inanimate objects in the sense of fomites) are incorrect.
• Question 6: A spontaneous mutation occurs randomly due to errors in normal DNA replication processes. Induced mutations are caused by external agents (like radiation or chemicals). Point mutations are a type of mutation affecting a single base pair. Nonsense mutations are a specific type of point mutation that introduces a premature stop codon.
• Question 7: The lactose operon has a regulator (produces repressor protein), control locus (includes promoter and operator), and structural locus (has genes for lactose - metabolizing enzymes). The inducer (like allolactose) is a molecule that interacts with the operon but is not a structural feature of the operon itself.

Answer:

• Question 5: an inanimate object
• Question 6: spontaneous mutation
• Question 7: the inducer