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ValentinkaMS [17]
2 years ago
15

Most neurodegenerative diseases involve inability to remove misfolded/aggregated proteins. The cellular organelle that often fai

ls in this context is:
a. mitochondria
b. nucleolus
c. proteasome
d. none of the above
Biology
1 answer:
klasskru [66]2 years ago
8 0

Answer: c. proteasome

Explanation:

Proteasomes are extremely important multi-catalytic proteases and are involved in various cellular functions. The proteasome is an essential component of eukaryotic cells and is responsible for the ATP-dependent proteolytic degradation of most cellular proteins. They are present in the nucleus and cytosol and can represent up to 1% of total cell proteins. Proteasomes generally degrade proteins to small peptides, most of which are rapidly hydrolyzed by cytoplasmic exopeptidases. It catalyzes the rapid degradation of many enzymes, regulatory proteins, and eliminates abnormal proteins resulting from mutation or damaged proteins. The inability of this cellular organelle can lead to neurodegenerative diseases, such as Parkinson´s disease.

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Phosphorus is required to synthesize the deoxyribonucleoside triphosphates used in DNA replication. A geneticist grows some E. c
Harlamova29_29 [7]

Answer:

<h2> After one round: one strand of DNA  will contain radioactive 3232P, while the other strand  will not contain any radioactive phosphate. </h2><h2> After two rounds:  here 50%  of DNA will have 3232P in both strands, while 50% will contain 3232P in one strand and nonradioactive in the other strand. </h2>

 

Explanation:

1. In the initial sample which is immediately removed after addition of radioactive isotope of phosphorus ( 3232P), hence there is  no incorporation of 3232P into the DNA because replication in the medium containing 3232P has not yet occurred.  

2. After one round of replication in  radioactive isotope of phosphorus ( 3232P) containing  medium, here  only one newly synthesized strand of DNA molecule will contain 3232P, while the other strand  will not contain any  radioactive isotope of phosphorus ( 3232P),  because DNA replication occurs in semi-conservative way.

3. After two rounds of replication in medium which contains radioactive isotope of phosphorus ( 3232P), here 50% of the DNA molecules will have  radioactive isotope 3232P in both strands, while the rest 50% will contain 3232P in only one strand and nonradioactive phosphorous in the other strand.

4 0
2 years ago
How big is the average watermelon?
nata0808 [166]

10 to 12 inches

Fruits are nearly round averaging 10 to 12 inches in diameter with an average weight of 24 pounds. Flesh is bright deep-red with high sugar content and relatively few small dark brown mottled seeds Read More… This popular oblong striped variety averages 22 to 24 inches long by 11 to 13 inches in diameter.

6 0
3 years ago
Can someone describe the main theories of intelligence​
kicyunya [14]

Answer:

The theories are grouped into four major theory types: (1) psychometric theories; (2) cognitive theories; (3) cognitive-contextual theories; and (4) biological theories.

8 0
2 years ago
On a line graph, a flat, horizontal line means that...
netineya [11]
<span>D. That they variable is staying the same.

Hope this helps (:

-Payshence xoxo</span>
6 0
2 years ago
Which of the following is likely NOT involved in this example of ecological succession?
Jobisdone [24]

If I am correct you answer will be

D) The concentration of salt becomes so high that all plant life is destroyed.

hope this helps

7 0
2 years ago
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