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Alexxx [7]
3 years ago
13

What are telomeres? What are telomeres? ""junk DNA"" present throughout the length of our chromosomes protein caps found on the

ends of chromosomes DNA sequences which code for making proteins that regulate cell division regions of DNA at the end of chromosomes which do not code for making proteins
Biology
1 answer:
NikAS [45]3 years ago
8 0

Answer:

Option (4).

Explanation:

Chromosome may be defined as highly compact DNA structure. The eukaryotic chromosome of different parts like centromere, short arm, long arm of chromosome and telomeres.

The telomeres are the DNA sequences present at the end of chromosome. These telomeres do not code for the proteins and get shorten after each round of replication. Telomeres are responsible for ageing in the living organisms.

Thus, the correct answer is option (4).

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What best describes the physical and chemical digestion of food
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<span>Physical Digestion - Physically breaking down (eg chewing)
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4 years ago
What would explain the change in the direction of air movement from daytime to night?.
tatyana61 [14]

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Explanation:

ta da

4 0
2 years ago
Explain what factors would cause a cell to stop at each of the 3 cell cycle checkpoints
Rudiy27

Answer and Explanation:

Cyclins and cyclin-dependent protein kinases (CDPKs, cell proteins) also function to control the cell cycle. A group of cyclins: the G1 cyclins, are synthesized during G1 phase and function to activate CDPKs which initiate DNA synthesis at the G1/S checkpoint. The cell fails to progress to S phase if there is no sufficient synthesis of G1 cyclins. After a cell passes through this point, the G1 cyclins are degraded, allowing for another group of cyclins: the M cyclins (mitotic cyclins) to be synthesized. M cyclins activate a second group of CDPKs which allow the cell to pass the G2/M control point and into mitosis.

In the G1/s check point, entrance into the S phase is blocked if the genome is damaged. In the G2/M check point, entrance into the M phase is halted if the DNA replication is incomplete. In the M phase, anaphase blocked if chromatids are not properly assembled.

6 0
3 years ago
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
monitta

D

Essentially, the path begins from the nucleus where the DNA is transcribed by RNA polymerase that makes a nascent mRNA.

Explanation:

The nascent mRNA is processed into a mature mRNA that is sent to ribosomes that outline the membrane of the Rough Endoplasmic Reticulum. When a polypeptide chain is translated by the ribosome, from the mRNA, the chain enters the lumen of the RER where it finds chaperons that help the proper folding of the chain into a required secondary, tertiary or quaternary structure. The protein undergoes further post-translational modification. Quality Control also happens here and only ‘well-made’ proteins are allowed to pass down to the Golgi apparatus. The Golgi apparatus also performs a few additional post-translation modifications but its major role is tagging these proteins for delivery, and packaging them. Vesicle budding off of this organelle carries the proteins to the cell membrane. The vesicle fuses with the cell membrane enabling the contents in the vesicle to be emptied outside the cell.  

Learn More:

To learn more about proteins check out;

brainly.com/question/1494707

brainly.com/question/2622106

brainly.com/question/5336167

brainly.com/question/5741476

#LearnWithBrainly

7 0
3 years ago
What could cause similar traits to evolve independently in different species?
Bad White [126]

give an example please

6 0
4 years ago
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