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VikaD [51]
2 years ago
8

Part A If you want to affect chromatin packaging, which amino acid could you mutate to affect both histone acetylation and methy

lation patterns? If you want to affect chromatin packaging, which amino acid could you mutate to affect both histone acetylation and methylation patterns?
methionine
histidine
lysine
asparagine
arginine
Biology
1 answer:
attashe74 [19]2 years ago
5 0

Answer:

Lysine

Explanation:

lysine residues on the histone tails of the octamer cn be activated by both acetylation and methylation patterns to influence accessibility or silencing of the genes respectiviely. for example, acetylation of H3K27 (histone 3 lysine residue 27) brings about a region of active chromatin allowing access to transcription activity while its trimethylation  will cause silencing of the associated gene at that particular area (no expression of that gene)

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Black coffee has a pH around 5; hand soap has a pH of 10. How many times more acidic is coffee relative
Anon25 [30]

Answer:

\boxed {\boxed {\sf 10^5 \ or \ 100,000 \ times \ more \ acidic}}

Explanation:

The pH scale stands for the power or potential of hydrogen. It measures how acidic or basic a solution based on the concentration of hydrogen ions and a scale from 1 to 14.

This scale is unique because it is logarithmic. So, every time the pH changes by 1 on the scale, the actual concentration of the solution increases or decreases by a tenfold.

So, a solution with a pH of 7 is ten times more acidic than a solution with a pH of 8. This can be translated to:

10^ {difference \ in \ pH}

The black coffee has a pH of 5 and the hand soap has a pH of 10. We want to find how many times more acidic coffee is, so we subtract 5 from 10 and get 5. The difference in pH is 5.

10^5=100,000

Coffee is <u>10⁵ or 100,000 times more acidic than hand soap.</u>

3 0
2 years ago
are narrow-diameter, unmyelinated sensory nerve fibers that transmit signals from pleasant touch. A. P tactile efferents B. C ta
KIM [24]

Answer:

Option E, C tactile (CT) afferent

Explanation:

Whenever a slow moving gentle touch experienced, the response is due to the nerve fibers called C-Tactile afferents (CTs).  

C-Tactile afferents (CTs) are unmyelinated mechanoreceptors  of low threshold and low conduction velocities.  

In humans, CT neurons are found in hairy skin.  

The pleasant feeling observed during a slow gentle touch is due to the interaction of  

CT neurons project to the insular cortex in the brain

Hence, option E is correct

4 0
3 years ago
If an atom has 15 electrons, how many electrons are in the n=1 energy level?
IRISSAK [1]

Answer:

In the n=1 energy level, the atom has 2 electrons

Explanation:

Electrons orbit the nucleus of an atom in multiple rings (energy levels). The first ring of the electron can only hold 2 electrons. After that, electrons are added to the second ring. Excluding the first ring, all other rings can hold a maximum of 8 electrons.

For example, Oxygen is an atom with 6 electrons. The first energy level contains 2 electrons, and the second energy level contains 4 electrons. The second energy level has room for up to 4 more electrons.

In your example of an atom with 15 electrons, there would be 2 electrons in the first ring, 8 electrons in the second ring, and 5 electrons in the third and final ring.

To summarize, all atoms have a first energy level containing 2 electrons, and all other energy levels can contain 8 electrons. This is true no matter the number of electrons.

7 0
2 years ago
What is the cause and effect between mutations and effects of gene expression?
Leto [7]
The cause of mutations in gene expressions are the changes of gene instructions that causes your protein to malfunction. The effect of mutations are the genes not being able to function properly and send the wrong codes/info to your cells.
7 0
2 years ago
Identify the statement that correctly describes the change in body size between Homo habilis and Homo erectus.
mina [271]
Involved a dramatic and sudden increase
4 0
3 years ago
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