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Wittaler [7]
3 years ago
8

Explain why red blood cells are unable to replace damaged proteins

Biology
1 answer:
Harman [31]3 years ago
3 0


The sole reason why red blood cells are unable to replace damaged proteins is that red blood cells lack DNA and cell organelles such as nucleus, ribosomes and mitochondria which are crucial for protein synthesis, assembly and repair. In other words they lack both the information and the machinery for making or repair of proteins.

Due to  lack of DNA and cell organelles, red blood cells cannot be able satisfy the central dogma which  summarizes synthesis of proteins as DNA → RNA → proteins.

DNA has the genetic information on how proteins should be made, RNA is responsible for transferring the information from DNA in the cell nucleus to the ribosomes  in the cytoplasm,  then translating or decoding  this information, which results in the making of  protein.

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why are you allowed to use the coarse adjustment when you focus the low power objective lens but not when you focus the high pow
FinnZ [79.3K]
Because you will focus past ("overshoot") your specimen. (Like using a race car as a shopping cart: it's too fast, and you'll fly past the cereal and never even see it before you realize you need to stop.) Also: you risk crushing the slide and objective against each other (on older or cheaper scopes), and that would be a costly (and embarrassing) mistake.
8 0
3 years ago
Yanni made a chart to compare the strong and weak forces. Which best describes Yanni’s error? Only the weak force is active in t
cluponka [151]

Answer: Option (d) is the correct answer.

Explanation:

Nucleus of an atom consists of protons and neutrons. Protons are positively charged and neutrons have no charge. So, due to the like charges of protons there occurs electrostatic force of repulsion inside the nucleus of the atom.

But due to similar number of neutrons and protons a force that is able to bind both of them together is known as strong nuclear binding energy.

This force is strong enough that it is able to overcome electrostatic force of repulsion. But when there is great difference in the number of protons and neutrons then binding force is not strong enough.

Hence, the atom becomes unstable and undergoes radioactive decay. So, this means weak forces are responsible for radioactive decay.

Thus, we can conclude that the statement which best describes Yanni’s error is that the strong force is responsible for radioactive decay.

8 0
3 years ago
Read 2 more answers
Which of the following structures is not a structure of the single celled-organism known as a prokaryote
Reil [10]

Explanation:

Hence, the correct answer is 'Nuclear membrane'.

\huge\bold\red     {Befikra❥☘⍣❦}

5 0
2 years ago
g Cerebrospinal fluid formed in the lateral ventricles travels through the ________ to reach the third ventricle.
kolezko [41]

Answer: Interventricular foramen

Explanation:

<u>The cerebrospinal fluid is a fluid that covers the brain and spinal cord. It circulates through the subarachnoid space, the cerebral ventricles and the ependymal canal</u>. Several diseases alter its composition and its study usually detects meningeal infections, carcinomatosis and hemorrhages. Some of its functions are:

  • Hydropneumatic support against local pressure for the encephalon.
  • Eliminates metabolites from the central nervous system.
  • Protects the central nervous system from trauma.

This fluid also fills the ventricles, which are large open structures deep within the brain and help keep the brain buoyant and cushioned. The lateral ventricles are the largest ventricles and connect to the third ventricle through the intraventricular foramen. This third ventricle is a narrow, medial cavity located between the diencephalic masses. <u>Then, the interventricular foramina are channels that connect with the ventricles of the lateral walls and with the third ventricle</u>, at the level of the midline of the brain. Like these channels, they allow cerebrospinal fluid to circulate through the rest of the ventricular system of the brain. The walls of the foramina also contain choroid plexuses, responsible for the production of cerebrospinal fluid, which continue in both the lateral ventricles and the third ventricle. After reaching the third ventricle, the cerebrospinal fluid travels through the median aperture into the subarachnoid space at the base of the brain.

6 0
3 years ago
Which of the following is a plant structure that aids in water retention?
harina [27]

Answer:

A

Explanation:

it holds water in the plant

4 0
3 years ago
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