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Brrunno [24]
3 years ago
11

In a gene cloning experiment, why are white colonies desirable (rather than blue colonies)?

Biology
1 answer:
gayaneshka [121]3 years ago
7 0

This is because the white colonies are the ones that have taken up the recombinant DNA, while the blue ones have not. This is called blue-white screening, a molecular cloning technique, and is conducted on X-gal medium and utilized selection using the beta-galactosidase gene.

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Which of the following is the correct definition of electrical energy?
marusya05 [52]

Answer:

electrical energy is a from of energy cause by electrons. The electrons flow the metals giving a shock of energy.

Explanation:

it can be used to power things with wires inside

have a nice day and mark me brainliest! :)

4 0
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Viruses and bacteria can infect human cells. Bacteria are living organisms, while viruses are not. How do you think the treatmen
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Answer:

hope it helps

Explanation:

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4 0
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This climate zone is most likely to have distinct seasons that range from hot to cold
4vir4ik [10]
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3 years ago
What is the Reynolds number for blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood
defon

Answer:

b. laminar flow

the reynold number is 1329.26

Explanation:

Re = (V x D x ρ)/ η

where,

V = mean velocity = 15.9 cm/s = 0.159m/s

D = vessel diameter = 2.15cm = 0.0215m

ρ = blood density = 1050 kg/m3 = 0.00105 kg/cm3

η = dynamic viscousity= 2.70 × 10-3 Pa·s = 2.70 × 10-3 kg/m-s

applying the formular to calculate for reynolds number, Re =

Re = (V x D x ρ)/ η

   =(0.159 x 0.0215 x 1050) / 2.70 × 10-3

   =3.589/0.0027 = 1329.26

the Reynolds number for the blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood has a dynamic viscosity of 2.70 × 10-3 Pa·s, a density of 1050 kg/m3, and travels at a mean fluid velocity of 15.9 cm/s is 1329.26

which flow through the aorta in a Laminar flow

Note that

a) turbulen= Re  >4000

b) laminar= Re  <2300

c) transitioning between laminar and turbulen= Re between 2100 and 4000

3 0
3 years ago
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