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Nadya [2.5K]
3 years ago
5

12) In developing the cell theory, Virchow proposed the idea that cells come from pre-existing cells. This was contradictory to

the beliefs of most scientists at the time. Louis Pasteur provided proof of this when he performed an experiment with sterilized nutrient broth. The broth in straight neck flasks grew bacteria, but the flasks with curved necks did not grow bacteria. How are scientific theories formed? A) from the opinions of very educated people B) from one experiment of a famous scientist C) from evidence gained by many experiments of many scientists D) ignoring any experimental evidence that does not fit the theory
Biology
2 answers:
Law Incorporation [45]3 years ago
3 0
<span>C) from evidence gained by many experiments of many scientists</span>
vampirchik [111]3 years ago
3 0

C) from evidence gained by many experiments of many scientists


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An increase in the number of snakes.

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3 years ago
3. What is peptidoglycan?
Dvinal [7]

Answer:

A combination of polypeptides and modified sugars that enclose the entire eubacteria.

Explanation:

A component of bacterial cell walls called peptidoglycan (PGN) promotes innate immune responses. Peptidoglycan, a polymer made of sugars and amino acids, creates the cell wall of the majority of bacteria by producing a layer that resembles a mesh outside the plasma membrane. N-acetylglucosamine and N-acetylmuramic acid residues are alternated in the sugar component. forms a saccules in the cell wall of most bacteria that resembles a bag. It controls bacterial cell shape and is crucial for osmotic stability. A heteropolymer made up of glycan strands carrying small peptides is known as a peptidoglycan.

5 0
2 years ago
Individuals without AFS have a glutamic acid at position 487 on the ALDH2 protein, whereas individuals with AFS have a lysine at
azamat

Answer:

Aldehyde Dehydrogenase 2 (ALDH2) is an enzyme required to eliminate toxins such as acetaldehyde and alcohol, thereby mutations in this protein may be associated with the Alcohol flush syndrome (AFS)

Explanation:

ALDH2 is a protein required for ATP generation by catalyzing the oxidation of aldehydes to carboxylic acids (i.e., oxidation of NADH to NAD+). Mutations in the ALDH2 gene have been associated with the inactive form of this enzyme, and this specific mutation at position 487 alters its enzymatic activity associated with the metabolism of acetaldehyde and alcohol. This amino acid substitution may lead to the active site-directed inactivation of the enzyme.

8 0
3 years ago
Which of the following is would be considered a phenotype?
olasank [31]
All of the above options
6 0
3 years ago
How can science be used to address "big" issues such as "global warming"?
Katarina [22]
<em>global warming is caused by different gases ,, hence they are affecting the environment by increasing temperature ,, only science can solve such a big problem because during global warming all the reactions that take place are scientific..</em>
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