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pogonyaev
3 years ago
7

Explain how a mutation in a bacterial cell could help it become resistant to infection by a bacteriophage

Biology
1 answer:
zhenek [66]3 years ago
6 0

Bacteria have different phage resistance mechanisms, such as spontaneous mutations, the CRISPR-Cas system.

Spontaneous mutations are the main mechanisms leading to phage resistance by altering the structure of bacterial wall components that act as phage receptors. These include lipopolysaccharides (LPS), outer membrane proteins, cell wall teichoic acids, capsules, and other bacterial components.

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Type 2 diabetes mellitus may reflect declining receptor sensitivity to insulin rather than decreased insulin production. Most Ty
AnnyKZ [126]

Answer:

Type 2 diabetes mellitus generally reflect declining receptor sensitivity to insulin rather than decreased insulin production- True.

Most Type II diabetes do not produce insulin- False.

Explanation:

Diabetes mellitus may be defined as the group of metabolic disorder that re characterized by the high blood glucose levels in the body of an individual.The receptor sensitivity decreases towards insulin decreases in Type II diabetes.

The insulin is produced in the proper amount during Type II diabetes. The receptors are unable to respond towards the diabetes.

Thus, the answer is a)-True

                                b)-False.

3 0
3 years ago
Which cells are responsible for the movement of photosynthates through a plant?
jasenka [17]

Answer:

sieve-tube elements, companion cells

Explanation:

Sieve-tube elements and companion cells are responsible for the movement of photosynthes through a plant.

The sieve tube elements are shorter (almost organelle-free) living cells, placed end to end, forming the sieve tubes. Their transverse cell walls are called sieve plaques that make connections between cells and through openings called sieves establish the connection between the cytoplasm of adjacent cells.  Each sieve is coated with calose (glucose polymer), which in winter can completely clog the vessel and then dissolve in spring. When infections occur or the vessel is parasitized, it can also be clogged with callose.

Companion cells are specialized parenchymal cells, which contain all the components that exist in living cells, including the nucleus, are the cells most closely linked to the sieved tube element. The Screened Tube Element and its companion cells are related in development, are derived from the same mother cell, and have several cytoplasmic connections to each other. Due to the many connections, the potential function of the companion cells is to release substances into the sieved tube element and, when the nucleus is absent, to include information molecules, proteins and ATP. When a screened element dies, its companion cells also die, which is a demonstration of this interdependence.

8 0
3 years ago
Waters slightly positive and negative charges make it a universal _________.
Viktor [21]
Universal solvent is the answer
4 0
3 years ago
Which of the statements below best describes the relationship between chromosomes and genes?
Anastasy [175]
Protein mainfactured by Gene and chromosome
3 0
3 years ago
The glomerulus differs from other capillaries in the body in that it ________.
zhuklara [117]

Answer:

The correct answer is "is drained by an efferent arteriole".

Explanation:

The missing options of this question are:

A) has a basement membrane

B) is impermeable to most substances

C) is drained by an efferent arteriole

D) has a blood pressure much lower than other organ systems

The correct answer is option C) "is drained by an efferent arteriole".

The glomerulus are a network of small blood vessels that are specialized to function within the kidneys. The role of the glomerulus is to filter plasma and being one of the steps of water absorption in the kidneys. The glomerulus differs from other capillaries in the body in that it is drained by an efferent arteriole, which carry the blood that has already filtered by the glomerulus.

4 0
3 years ago
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