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In-s [12.5K]
3 years ago
15

The development of cars has pos and cons.the car has allowed for better transportation, but it is also responsible for a great d

eal of pollution. Which activity helps solve the pollution problem though the use of new technology
A: Encouraging people to ride a bus
B:Encouraging people to walk more
C:Building cars that runs on non-polluting fuels
D:Building fewer cars
Biology
1 answer:
sergeinik [125]3 years ago
6 0
I think its c.
i hope this helps!
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Hello!

There are two possible answers to this. The one I'm assuming you're looking for is hydrogen bonds.

Hydrogen bonds are the bonds which hold together the double helix shape of DNA. These bonds result from a positive and negative charge drawing two molecules closer to each other. These bonds are generally seen as weak, however, since there are so many of these bonds (as there are so many nitrogenous bases in one strand of DNA), the double helix strand is fairly strong.

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3 years ago
Which of these elements is essential to making up all organic molecules?
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As Lisa drove home, she was suddenly alerted to the sound of a blaring horn and realized she had drifted off to sleep. Which ner
Dafna11 [192]

Answer:

B) sympathetic nervous system

Explanation:

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3 years ago
The pKa of an acid depends partly on its environment. Predict the effect of each of the following environmental changes on the p
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The pKa represents the pH of the medium at which the zwitterionic amino acid assumes most stable ionic form due to structural stabilization. As the pKa is dependent upon the environmental factors of the solution around the amino acids, a change in their structure and localization can cause change in the pKa of the protein. Thus, the answers can be found as below:

Part A: Decrease (As the lysine is basic in nature, it will tend to stabilize the electrostatic interaction and weak interactions between the acidic amino acids and hydrogen bonds in the viscinity, thus lowering the pH and hence pKa of the protein)

Part B: Increase (As the carboxyl group is acidic in nature, removal of it will tend to increase the pKa since the basic amino acids will tend to accumulate more negative charge in their viscinity)

Part C: Increase (As glutamic acid is an acidic amino acid, its shift from outside to a non-polar site will prevents its ionization and hence the pKa will tend to shift from slightly acidic to slightly basic, hence increase)
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19. Which statement about epithelium is correct?
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Answer:

It is thin tissue that lines the alveoli

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