QUESTION 5

Biology

1 answer:

Fed [463]3 years ago

5 0

Lack of consumption is the correct answer

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How and why might the R0 value change over time during an outbreak? pls help

Stolb23 [73]

Answer:

Vaccinations

Explanation:

For example, if a disease has an R0 of 18, a person who has the disease will transmit it to an average of 18 other people. That replication will continue if no one has been vaccinated against the disease or is already immune to it in their community. So if you have (for example) a vaccination then you're less likely to get it, resulting in a lower R0

6 0

3 years ago

Draw a picture of DNA replication. Label the direction each strand is going, the enzymes involved with each step, the leading an

Step2247 [10]

Answer:

The fork is drawn to emphasize its similarity to the bacterial replication fork depicted in Figure. Although both forks use the same basic components, the mammalian fork differs in at least two important respects.

First, it uses two different DNA polymerases on the lagging strand.

Second, the mammalian DNA primase is a subunit of one of the lagging-strand DNA polymerases, DNA polymerase α, while that of bacteria is associated with a DNA helicase in the primosome. The polymerase α (with its associated primase) begins chains with RNA, extends them with DNA, and then hands the chains over to the second polymerase (δ), which elongates them. It is not known why eucaryotic DNA replication requires two different polymerases on the lagging strand. The major mammalian DNA helicase seems to be based on a ring formed from six different Mcm proteins; this ring may move along the leading strand, rather than along the lagging-strand template shown here.

Reference: Molecular Biology of the Cell. 4th edition. Alberts B, Johnson A, Lewis J, et al. New York: Garland Science; 2002.