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
GrogVix [38]
3 years ago
15

A. E. coli is able to use foods other than glucose in the absence of available glucose, because falling levels of glucose cause

an increase of B) activator protein
A) operator
B) promotor
C) structural gene
D) CAMP
Biology
1 answer:
Gnom [1K]3 years ago
3 0

Answer: D) cAMP

Explanation:

In the absence of glucose cell can make use of other sources of carbohydrates such as lactose. In E. Coli and other bacteria utilization of lactose depends on the availability of cAMP. Bacteria accumulate cAMP only when starved. When glucose is exhausted, cAMP is available in plenty.

cAMP is necessary for the gene expression because it binds catabolite repressor protein (CAP) to form CAP-cAMP complex. CAP is a lac repressor the binds to the operator site of the lac operon preventing RNAP From binding to the promoter.

RNA polymerase can bind to the promoter site only when CAP-cAMP formed

You might be interested in
Before a captive breeding program and subsequent reintroduction of the black-footed ferret it is believed that their total popul
irga5000 [103]

Answer:

a) 99.93%

b) 99.98%

Explanation:

Given that:

Total population size was only around 18 individuals ( for  black-footed ferret)

If the annual survival rate in the wild was 0.4%.

a)

What is the probability that all 18 would have died in a single year?

To find that; we multiply the annual survival rate in the wild with the total population; which is:

(0.4%×18) = 0.072%

Then; we subtract it from a total of 100% in order to determine the probability that all 18 would have died in a single year.

= (100.00% - 0.072%)

= 99.93%

b)

What is the probability that all 18 would have died in a single year if canine distemper was present?

Given that;

Because of the presence of canine distemper disease, the annual mortality rate might have been as high as 0.89.

To determine the probability; we have:

1 - Annual mortality rate = annual survival rate

1 - 0.89 = 0.11 %

Therefore, 0.11% of 18 individuals = (0.0011 × 18)

= 0.0198%

Probability that all 18 would have died in a single year if canine distemper was present = 100 - probability of annual survival rate

= (100 - 0.0198)%

= 99.98%

7 0
3 years ago
What happens to cells in multicellular organisms as they continue to divide and increase in size?
DiKsa [7]
I think the correct answer from the choices listed above is option C. Cells in multicellular organisms differentiate as they continue to divide and increase in size because cells will now perform special functions and have become different to other cells. Hope this answers the question.
6 0
2 years ago
Read 2 more answers
Differentiate the types of muscle- skeletal, cardiac, smooth
Phantasy [73]

Answer:

Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to pump blood. The smooth muscle tissue that forms organs like the stomach and bladder changes shape to facilitate bodily functions.

Explanation:

4 0
2 years ago
Read 2 more answers
ANSWER ALL QUESTIONS<br>Name four activities carried out in agriculture as an art​
Sladkaya [172]

Answer:

planting

measuring

weeding

harvesting

Explanation:

hope this helps

don't forget to follow me

n mark my answer

4 0
2 years ago
As of 2011, an estimated _____ a0 percent of the U.S. workforce was working in agriculture-related jobs.
bixtya [17]

Answer:

In 2011 an estimated 1.65% of the US workforce was employed/working in the Agriculture-related sector of the economy

Explanation:

Agriculture has been a major source of jobs for most countries especially with developing/underdeveloped countries ranking in the highest percentage of their country's population working in this sector, while developed countries like the US have smaller percentage of the population working agriculture-related jobs. as of 2011 chad had an estimated 86.67% of their population involved with Agriculture-related jobs

7 0
2 years ago
Read 2 more answers
Other questions:
  • What will eventually happen as the earth's core cools down over billion of year?
    8·1 answer
  • An advantage of the current organism classification system is that ______.
    12·1 answer
  • Which of the following phyla contains only marine animals?
    11·2 answers
  • What is produced by the process of meiosis?
    10·2 answers
  • Have any species (with the exceptions of humans) been observed to kill themselves purposefully?
    14·2 answers
  • Produces H+ ions when added to water<br><br> A) Base<br> B) Ion <br> C) Acid
    14·2 answers
  • Animals breathe out?
    10·1 answer
  • Someone help with this pls
    9·1 answer
  • What are three economical values associated with biodiversity?<br> Please hurry!!
    15·1 answer
  • Using the diagram, relate the levels of glucose, insulin, and glucagon to each other.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!