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3 years ago

Q2. Explain why life could not exist without the activities of microorganisms.

Biology

1 answer:

harina [27]3 years ago

4 0

Answer:

In explanation.

Explanation:

Why life could not exist without the activities of microorganisms?

-Without microorganisms, the entire food web would collapse. Shallower oceans would fare a little better. So would our crop plants; without microbes to provide plants with nitrogen, the Earth would experience a catastrophic de-greening.

-We wouldn't be able to digest our food properly without our gut bacteria. Crops around the world would start to die without the nutrients generated by microbes. Dead fish would float to the surface of lakes and oceans, and ocean life would be extinguished.

-Nitrogen would not be available in a form that humans and plants could use.

-The supply of O2 would eventually be depleted if microorganisms were not available to replenish it.

-A wide variety of materials would pile up if microorganisms were not present to degrade them.

-Hope this helps.

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Pyruvate + Oxygen → _________ + 2 ATP

alina1380 [7]

A) ATP is the correct answer

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3 years ago

Plant Cell Writing Prompt

jeka94

Answer:

Plant cell

Explanation:

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3 years ago

Which food is at a temperature that allows bacteria to grow well ? A) a roast at 125•F (52•c) B) hamburgers at 165•f (74•c) C) p

Lilit [14]

The correct answer is A) A roast at 125°F (52°C)

Explanation:

In general terms, bacteria thrive at warm temperatures; this means bacterial growth is lower at extremely hot/cold temperatures, but it is higher at warm or medium temperatures. Indeed, the ideal temperature for bacteria to develop and reproduce is between 4° C and 60°C. This implies from the options given the roast at 52°C represents an ideal temperature for the growth of bacteria. Also, other options include temperatures above 60°C, and therefore do not allow bacteria to grow well.

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4 years ago

What role does the MutL protein play in DNA repair? (5 POINTS) It performs a proofreading function, similar to DNA polymerase, a

Zinaida [17]

Answer:

It recognizes and binds to a pair of "mismatched" nucleotides, preventing their translation.

Explanation:

Mut L protein is involved in mismatch DNA repair. MutL protein is complexed with MutS protein and the MutL-MutS complex recognizes all the mismatched base pairs present in the newly formed DNA strand. The complex can not recognize the "C-C" pairs. MutH protein joins the complex.

The MutH protein also has a site-specific endonuclease activity and cleaves the unmethylated DNA strand towards the 5' end of the guanine base in the GATC sequence to mark the strand for DNA repair. In this way, MutL protein, along with MutS and MutH proteins mark the mismatched DNA bases for repair so that they are not translated into a faulty protein.

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3 years ago

Lipids are important to living things for all of the following reasons, EXCEPT that they are

Strike441 [17]

ANSWER:

Needed to form cell membranes

I hope I was of help to you :)

6 0

3 years ago