Question

During a research experiment, it was found that the number of bacteria in a culture grew at a rate proportional to its size. At 6:00 AM there were 4,000 bacteria present in the culture. At noon, the number of bacteria grew to 4,700.

How many bacteria will there be at midnight?

Answer #1

In a certain culture where the rate of growth is proportional to
the number present, the number triples in 3 days. If at the end of
7 days there are 10 million bacteria present in the culture how
many were present initially?

The population of a bacteria in a culture grows at a rate
proportional to the number of bacteria present at time t. After 3
hours it is observed that 400 bacteria are present. After 10 hours
2000 bacteria are present. What was the initial number of
bacteria?

Bacteria grown in a certain culture
increase at a rate proportional to the amount present. If there are
3000 bacteria present initially and there are 5000 in 1 hour, how
many bacteria will there be in 3.5
hours?

The population of bacteria in a culture grows at a rate
proportional to the number of bacteria present at time t. After 2
hours from the beginning, it is observed that 500 bacteria are
present. After 5 hours (from the beginning), 1500 bacteria are
present. What is the initial number of bacteria P0 ?
Hint: Use P(t) = P0ekt
A - 240 at beggining
B - 198 at beggining
C - 541 at the beggining
D - None of the...

The bacteria in a culture increased from 600 at 1:00 P.M. to
3600 at 6:00 P.M.
(a) Find the expression for the number of bacteria t
hours after 1:00 P.M.
Q(t) =
(b) Find the number of bacteria that will be present at 7:00 P.M.
(Round your answer to the nearest whole number.)
bacteria
(c) When will the population reach 18,000? (Round your answer to
one decimal place.)
hr
(d) How long does it take the population to double in...

A bacteria culture initially contains 40 cells and grows at a
rate proportional to its size.
After 2 hours the population has increased to 120.
a) Find an expression (in exact simplest form) for the number of
bacteria after t hours.
b) Find the rate of growth at t = 5 hours. Round your final answer
to nearest whole number.

Q1. An experiment studied the role of the
complement system for clearance of bacteria from the blood of mice.
Two types of mice were used in the study: C1q-knockout
mice and wild type mice. The mice were infected with either
antibody-coated or un-coated bacteria (in a fully factorial design,
i.e, both mouse genotypes were exposed to both types of
bacteria), and the clearance rate was measured during two hours
after bacterial administration. Explain the protecting mechanisms
(not only those involving...

3. The growth rate of Escherichia coli, a common bacterium found
in the human intestine, is proportional to its size. Under ideal
laboratory conditions, when this bacterium is grown in a nutrient
broth medium, the number of cells in a culture doubles
approximately every 20 min. a. If the initial population is 10,
determine the function Q(t) that expresses the growth of the number
of cells of this bacterium as a function of time t (in minutes).
Q(t)=________ b. If...

The data below were collected during a passive membrane
transport experiment where two solutes (A and B) were evaluated
relative to their separate transport proteins.
Solute A
[S] mM
Transport rate (mmol/min)
Solute B
[S] mM
Transport rate (mmol/min)
2.0
0.3
2.0
0.5
4.0
0.7
4.0
1.0
6.0
1.0
6.0
1.4
8.0
1.3
8.0
1.6
10.0
1.5
10.0
1.7
12.0
1.7
12.0
1.8
14.0
1.9
14.0
1.9
16.0
2.0
16.0
2.0
18.0
2.0
18.0
2.0
Identify the Km for Solute...

#4
A research paper describes an experiment in which 74 men were
assigned at random to one of four treatments.
viewed slides of fit, muscular men
viewed slides of fit, muscular men accompanied by diet and
fitness-related text
viewed slides of fit, muscular men accompanied by text not
related to diet and fitness
did not view any slides
The participants then went to a room to complete a
questionnaire. In this room, bowls of pretzels were set out on the...

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