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Vera_Pavlovna [14]
3 years ago
8

The addition of acetyl groups to histones is associated with

Biology
2 answers:
anygoal [31]3 years ago
6 0
The addition of acetyl groups to histones is associated with chromatin condensation and and higher levels of gene expression
Scorpion4ik [409]3 years ago
5 0
Hi there,
The addition of acetyl groups to histones is associated with decondensation at higher levels

Hope this helps :))

~Top 
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Identify how the deletion of a single nitrogen base in DNA can cause a harmful mutation in an organism.
ra1l [238]

Answer:

B. Nearly every amino acid translated after the error will create the wrong protein after the deletion of a base.

Explanation:

Generally, mutations occur in two ways: 1) a base replacement, where one base is replaced for another; 2) insertion or deletion, where a base is either incorrectly inserted or deleted from a codon.

When a nucleotide is wrongly inserted or deleted from a codon, the effects of this change can be extreme. An insertion or deletion can affect every codon in a particular genetic sequence.  For example, given the code:

GAU GAC UCC GCU AGG. It is the codes for the amino acids aspartate, aspartate, serine, alanine, and arginine. If the A in the GAU were to be deleted, the code would become GUG ACU CCG UAG G. It won't produce any right amino acid.

So, if the code becomes changes, it won't produce any amino acid or will produce the wrong amnio acid.

8 0
3 years ago
Paramecium live in freshwater environments like the Potomac River. Therefore, water is constantly moving into their cells. Param
ICE Princess25 [194]

Answer:

The correct answer is - osmosis.

Explanation:

Paramecium lives in freshwater like the Potomac River which is hypotonic to the cytosol of the paramecium. Paramecium uses contractile vacuoles to transport the water from the lower concentration (outside of the cell) to a high concentration of solvent to the inside of the cells.

This process of cell transport is carried out by osmosis as their cytoplasm contains a higher concentration of solutes outside the cell. This excess water is collected into vacuoles called contractile vacuole that swells and finally internalized the water to the outside of the cell.

Thus, the correct answer is - osmosis.

3 0
3 years ago
Mass Extinctions May Have Been Caused By Meteors
tamaranim1 [39]

Answer:

Yes, Mass Extinctions May Have Been Caused By Meteors, as the probability of mass extinction occurring after an asteroid that could hit a random location on the Earth's surface was approximately 13% when the Chicxulub-scale asteroid hit the Earth. 

Soot could be the main cause of mass extinction after an asteroid impact.

5 0
3 years ago
Read 2 more answers
Which isn’t a principle of cell theory
harkovskaia [24]

Answer:

That cells are not the building block of life

Explanation:

5 0
2 years ago
How many organs are in a human body.? (Important ones) If you can go into detail
grandymaker [24]

Answer:

You can look it up so 79-1 because appendix so 78

Explanation:

Good luck on your bio paper

8 0
1 year ago
Read 2 more answers
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