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Lelechka [254]
3 years ago
10

which piece of DNA would have the highest tm one with a cytosine plus guanine comment at t 30% or a cystonie plus guane content

of 50% if both are heated under the same conditions
Biology
1 answer:
erik [133]3 years ago
6 0

Answer:

50% G+C will have a higher Tm

Explanation:

The Temperature of Melting (Tm) refers to the temperature at which 50% of double-stranded DNA (dsDNA) is changed to single-standard DNA (ssDNA). In the double helix of DNA, Adenine bases always pair with Thymine bases through two hydrogen bonds, whereas Guanine bases always pair with Cytosine bases through three hydrogen bonds. In consequence, a DNA molecule containing a higher GC content is more stable than another DNA molecule containing a lower GC content. The Tm can be calculated as follows = 2 °C(A + T) + 4 °C(G + C) = °C Tm (this equation is useful for oligonucleotides of 14 to 20 base-length).

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Almost every cell in the human body is replaced every few years through the process of _____.
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3 years ago
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During hot weather and vigorous exercise people sweat. as the water on their skin evaporate the water molecules absorb heat ener
Vedmedyk [2.9K]
The heat to evaporate the water in the sweat comes from the skin and provides a cooling effect. The body then does not overheat. hope it help
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3 years ago
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76.
yarga [219]

Answer:

Happy cats blink eyes, keep whiskers forward and tail relaxed; Aggressive Cat lowers tail and make it stiff, crouches etc; an Angry cat is rigid and curls itself around its body and a Depressed cat sleeps more than usual.

Explanation:

A Veterinary  assistant must be well aware about different body languages of cat. Cats show different body postures in different moods.  

i) HAPPY CAT- A happy cat returns our gaze with a blink an eye and there will be a dilation in the eye that indicates happiness and tail will be relaxed.

ii) AGGRESSIVE CAT- An aggressive cat can both be defensive and offensive. Offensive body language includes- stiff and straight leg, lowered stiff tail and a defensive language includes- Crouching of body and eyes completely dilated.

iii) ANGRY CAT- Angry cat has a rigid posture, growls and make its body curled up and make itself look large.

iv) DEPRESSED CAT- Depressed cats hold its ear back and make their fur stand at the end, they tuck their tail and sleeps more than usual.

6 0
3 years ago
Considering the ideas of John Dalton, what is a possible hypothesis for the three experiments described in the lesson?
Leto [7]

Answer:

1.)Cathode rays are charged particles called corpuscles.

2) These corpuscles are the constituents of the atom.

3) They are the only constituents.

Explanation:Hope This Helps

6 0
3 years ago
A scientist discovers that a soil bacterium he has been studying produces an antimicrobial that kills Gram negative bacteria. Sh
nexus9112 [7]

The question is incomplete as it does not have the options which are:

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natural

Answer:

Semisynthetic

Explanation:

Antibiotics are the microbial compounds which are obtained from the micro-organisms which are found effective against the bacteria as they act by inhibiting the activity of the bacteria which ultimately kills the bacteria.

These antibiotics can also be distinguished based on their synthesis: natural, semi-synthetic and synthetic antibiotics.

The semi-synthetic antibiotics are the antibiotics which are obtained from the microbes but are modified artificially by making chemical changes to increase the effectiveness of the antibiotic and making the antibiotic as broad-spectrum bacteria.

Since the properties of the antibiotics provided in the question are similar to the semi-synthetic antibiotics, therefore, is considered semi-synthetic bacteria.

Thus, Semisynthetic  is correct.

4 0
3 years ago
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