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stellarik [79]
3 years ago
11

A (n) _______________ is an injection of weakened or dead viruses or bacteria, or pieces of proteins from weakened or dead virus

es or bacteria. It is given to help the immune system of people "learn" how to defeat the real virus or bacteria. A) antibiotic B) antibody C) pathogen D) vaccine
Biology
2 answers:
N76 [4]3 years ago
8 0

the answer is

D). Vaccine

Yanka [14]3 years ago
4 0
I believe it’s D. Vaccine
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I need to know the hypothesized enzyme
worty [1.4K]

Answer:

Hypotheis:

<em>If high amounts of product in the samples, '+++' , correlates with optimal temperatures and pH for enzyme activity, then...</em>

  • <u>A- Pepsin</u>
  • <u>B- Amylase </u>
  • <u> C- thermophilic enzyme</u>

Explanation:

Enzymes are specialized proteins that function as biological catalysts- <u>they speed up chemical reactions.</u> As proteins, these are susceptible to changes in temperature and pH- they function best at optimal values for both conditions, but can be denatured, rendering them inactive at relative extremes.

Each enzyme provided has its own optimal temperature and pH values.

  • Thermophilic enzymes are usually found in regions characterized by high temperatures. They show high thermostability, and do not become denatured at high temperatures- they thrive, and do not function well at lower temperatures.
  • Amylase is a hydrolase digestive enzyme found in the mouth, that acts on polysaccharides like starch to break 1,4  glycosidic bonds between glucose molecules. It works best at a physiological (neutral) pH and temperatures (around 37°)
  • Pepsin, another digestive enzyme, is a peptidase that breaks down proteins into peptide molecules. It is found in the stomach lining, where the pH  is typically low i.e. acidic due to the hydrochloric acid in digestive juices.

Thus from the table A- pepsin, B- Amylase and C- thermophilic enzyme can be hypothesized.

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3 years ago
In the 1950s, what discovery revolutionized biotechnology?
svetlana [45]
Answer: c. molecular structure of DNA
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Which of the following results from an uncontrollable growth of abnormal cells? A.complex disease B.chromosomal disease C.single
attashe74 [19]
<span>B. Chromosomal disease results from an uncontrollable growth of abnormal cells.</span>
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3 years ago
Read 2 more answers
What claim implies the tea
wlad13 [49]

Answer:

D.

Explanation:

The immune system lowers the chances of bacteria, viruses, and diseases entering your body

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Is a scorpion a keystone species
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Answer:

Keystone Species: Kangaroo Rat Keystone species are species whose presence and role within an ecosystem has a disproportionate effect on other organisms within the system. Hawk (predator)/lizard (prey). scorpion (predator)/insect (prey). if their is no relationship between these two then the scorpions will die off and the insects will thrive.

Explanation:

Please check out my question

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