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Nesterboy [21]
3 years ago
14

Which is true about enzymes? Question 20 options: They act on nonspecific, randomly chosen substrates. After a reaction, they ca

nnot be reused. They can speed up metabolic processes in the body. They cannot change shape.
Biology
1 answer:
alexdok [17]3 years ago
4 0

Answer:

They can speed up metabolic rate in the body.

Explanation:

Enzyme generaly lower activation energy of the substrate so that the rate of chemical reaction cam be increased.

This characteristics of enzymes makes them to be called organic catalysts.They are responsible for aiding fast completion of most biochemical activities in living organisms.

They usually react with specific substrates with their specific Active sites.

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Which of the following actions is caused by contraction of skeletal muscle? Select one: a. contraction of the heart b. moving yo
Virty [35]

Answer:

B-Moving your feet in walking

7 0
3 years ago
Which of the following is an example of using relaxation techniques? a. flight-or-flight response b. visualization c. rational r
kirill115 [55]

Answer:

Option B

Explanation:

Flight-or-flight response is a response or physiological reaction towards external stimuli. Systematic desensitization is a methodology to control anxiety during speech. Hence, these two are not relaxation techniques.  Transforming novelty into familiarity is also a methodology to remain prepared during a speech by practicing it well. Visualization is a technique that helps our mind to relax by using imagination to reach a relaxed state of mind.

Hence, option B is correct

8 0
3 years ago
Which of the domains include
grin007 [14]

Answer:

Domain Bacteria.

Explanation:

=)

7 0
2 years ago
Give the source of information (author, title, source,pages
Mila [183]

There are microorganisms that are able to live in extreme environments under adverse conditions of pH, temperature and salinity. These microorganisms are classified as extremophiles.  Within the group of extremophiles there are halophilic bacteria, which are those capable of living in extremely saline environments.

One biological factor that all living things are subject to suffer from is osmotic pressure. Halophilic microorganisms have developed mechanisms to adapt to saline environments where osmotic pressure acts with great intensity on individuals. These bacteria change the chemical composition of their membranes and also accumulate osmoprotective compounds in their cytoplasm to compensate for osmotic stress.

RAMIREZ, N; SANDOVAL, AH  y  SERRANO, JA. Las bacterias halófilas y sus aplicaciones biotecnológicas. Rev. Soc. Ven. Microbiol. [online]. 2004, vol.24, n.1-2 [citado  2019-09-22], pp. 12-23 . Disponible en: <http://ve.scielo.org/scielo.php?script=sci_arttext&pid=S1315-25562004000100004&lng=es&nrm=iso>. ISSN 1315-2556.

6 0
2 years ago
Compare the shapes of the organisms that have cell walls with those that do not have cell walls.
inna [77]
The best answer is A. The purpose of the cell wall is to hold the cell in a specific shape, usually rectangular or square. For example, a plant cell's wall keeps it rigid so that the plant can stand up. 

If the cell does not have a wall, it can easily change shape to accommodate for things coming in and out of the cell. 

Hope this helps!
5 0
3 years ago
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