1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
True [87]
3 years ago
7

Suppose that you began a one-year study of tuberculosis (TB) in St. Petersburg on January 1st, 2018. You enrolled 200 residents

in your study and checked on their TB status on a monthly basis. At the start of your study on January 1st, you screened all 200 residents. Upon screening, you found that 10 of the healthy residents were immigrants who were vaccinated for TB and so were not at risk. Another 10 residents already had existing cases of TB on January 1st. On February 1st, two residents developed TB. On April 1st, three more residents developed TB. On July 1st, three of the residents who had existing TB on January 1st died from their disease. The study ended on December 31, 2018. Assume that once a person gets TB, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up.
What was the prevalence of TB in the screened community on January 1st?
Biology
1 answer:
Zarrin [17]3 years ago
4 0

Answer:  5%

Explanation:

The Prevalence rate is the term used to describe the percentage of a population that have contacted the disease being tested for. It is usually done over a certain period or a certain time.

The prevalence of TB in the screened community on January 1st therefore is;

= Number of infected/ No. of Tested residents

= 10/200

= 5%

You might be interested in
How does weathering work
lilavasa [31]
It accuses in warm or wet climates. Rocks break down by dissolving or reacting with the minerals that are in the rock.
5 0
3 years ago
Digestion includes breaking substances into their simpler building blocks, synthesizing more complex cellular structures from si
kicyunya [14]

Answer:

The correct answer is - false statement.

Explanation:

The statement mentioned in question explaining the process of metabolism. Metabolism is a procedure that includes catabolic and anabolic process that which are chemicals reactions takes place in the body. Metabolism is breaking large molecules into simpler and simpler molecules to synthesizing complex molecules from simpler molecules.

Digestion is the process in which ingested food break down to simpler substances and absorbed to provide nutrients to body.

Thus, the correct answer is - false statement.

8 0
3 years ago
Name the subdivisions of the small intestine in a proximal to distal direction. do the same for the subdivisions of the large in
Elanso [62]

The duodenum can therefore be subdivided into four segments: the superior, descending, horizontal, and ascending duodenum. ... The three regions of the small intestine are the duodenum, jejunum, and ileum. The jejunum is about 0.9 meters (3 feet) long (in life) and runs from the duodenum to the ileum.

6 0
3 years ago
How many possible open reading frames (frames without stop codons) are there that extend through the following sequence? 5'... C
fenix001 [56]

Answer:

There are 4 reading frames without stop codons.

Explanation:

1) To find the possible reading frames you need to separate your sequence in codons (trios)  for the 5'-> 3' sense, first, excluding the first nucleotide, then excluding 2 nucleotides and then not excluding nucleotides.

5'... C TTA CAG TTT ATT GAT ACG GAG AAG G... 3'  NO STOP CODON

5'... CT TAC AGT TTA TTG ATA CGG AGA AGG... 3'  NO STOP CODON

5'... CTT ACA GTT TAT <u>TGA</u> TAC GGA GAA GG... 3'

2)Then you find the complementary sequence (which you already have)

3'... GAA TGT CAA ATA ACT ATG CCT CTT CC... 5'

3'... GA ATG TCA AAT AAC TAT GCC TCT TCC... 5'

3'... G AAT GTC AAA TAA CTA TGC CTC TTC C... 5'

3) Next, you have to obtain the reverse complementary

CCT TCT CCG TAT CAA TAA ACT GTA AG NO STOP CODON

CC TTC TCC GTA TCA ATA AAC TGT AAG NO STOP CODON

C CTT CTC CGT ATC AAT AAA CTG <u>TAA</u> G

4)Now you need to find start (AGT in terms of DNA) and stop codons(<u>TAA</u>, <u>TAG,</u> <u>TGA</u>, also in terms of DNA), in 5->3 and de reverse complementary.

<em />

<em>As you can see, you have for open reading frames that lack of stop codon, unfortunately, they also lack of AGT, the start codon.</em>

I added a table where you can find thestart and stop codons as well as the proteins that they translate to in terms of RNA.

I hope you find this information interesting and useful, good luck!

8 0
2 years ago
How much carbon dioxide emissions from human activities is absorbed by carbon sinks? A.75%
Nikitich [7]
I’m pretty sure it’s b.50%
7 0
2 years ago
Other questions:
  • The first car of using two words as a scientific name
    11·1 answer
  • Explain long term immunity. Thanks
    13·1 answer
  • Which bases are found in a strand of DNA?
    13·1 answer
  • A ten mile area of trees is removed from the tropical rainforest. How will this affect the amount of water and the amount of oxy
    10·1 answer
  • If a planet in our solar system is a gas giant planet it is near the sun. If a planet in our solar system is a gas giant planet
    5·1 answer
  • What is the cellular process of sexual reproduction
    15·1 answer
  • What is one way a plain can form
    14·2 answers
  • Is this the krebs cycle or the calvin cycle? They both have to do with photosynthesis.
    7·1 answer
  • Comparing chemical reactions. Identify the true statements below.
    12·1 answer
  • Which one of the amino acids is capable of forming a disulfide linkage with itself?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!