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3 years ago

when running a gel you need to have a positive control and negative control. what do these mean and what are they each used for?

1 answer:

3 0

I believe the positive control receives a treatment with a known response, so that this positive response can be compared to the unknown response of the treatment. This is used in electrophoresis to compare the DNA strands to the DNA standard. The negative control is used when no response is expected, which is also used in the process of electrophoresis. Electrophoresis is a technique used in laboratories in order to separate macromolecules based on size. It applies a negative charge so proteins move towards a positive charge. It is sued for the analysis of both DNA and RNA.

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#11 TRUE or FALSE???

Nuetrik [128]

Answer:

True

Explanation:

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3 years ago

2. What are 3 examples of lipids and what functions do they serve in organisms' bodies?

svlad2 [7]

Answer:

Examples of lipids include fats, oils, waxes, certain vitamins

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3 years ago

Explain why algae swim up from the bottom of a pond during an afternoon

Effectus [21]

Explanation:

What happens during daytime is, oxygen that gets trapped between filaments of algae, moves them to the surface and during night as O2 is not produced, they slowly sink to lower depths, and you don't see them

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3 years ago

What is the period of a satellite in a circular orbit just above the surface of the Moon? The Moon’s mass is 7.36 × 1022 kilogra

Tanya [424]

Answer:

Explanation:

The satellite revolves around moon due to centripetal force which is provided by gravity in this context so we can equate gravity and centripetal force.

$mrw^{2} = \frac{GMm}{R^{2} }$

where, m is mass of satellite

M is mass of moon

ω is angular velocity

G is Universal gravitational constant

R is the radius of moon

from the above equation we get ω as,

$w=\sqrt{\frac{GM}{R^{3} } }$

$T = \frac{2\pi }{w}$

$T= 2\pi \sqrt{\frac{R^{3} }{GM} }$

here M = 7.36 X 10^22

R = 1.738 X 10^6

G =6.67 X 10^-11

$T= 2X3.14 \sqrt{\frac{(1.738 X 10^6)^{3} }{6.67 X 10^-11 X 7.36 X 10^22} }$

T= 6.50 X 10^3 seconds

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3 years ago

What is the role of RNA polymerase in transcription?

galben [10]

Answer: synthesize RNA by following a strand of DNA. RNA polymerase is an enzyme that is responsible for copying a DNA sequence into RNA sequence, during the process of transcription

Explanation:

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3 years ago

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