1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ExtremeBDS [4]
3 years ago
6

What is the cell nucleus?

Biology
1 answer:
Novay_Z [31]3 years ago
5 0
The nucleus is located in the middle of a cell. It holds dna.
You might be interested in
Which statement is an example of an observation the student could have made
docker41 [41]
If you gave a little more information i could help you... which statements? is this a multiple choice?
8 0
3 years ago
1.True or false: It may be possible to save a significant proportion of Earth's biological diversity by establishing sustainable
Bezzdna [24]
1. True. Establishing more sites for the protection of biodiversity across the world can go a long way and would have a chain reaction in the ecosystem. Thus, it will save a lot of our planet's biodiversity. 2. a. -Philiab. -trophicc. eco-d. eu-3. A habitat is where certain species, animals, or organisms naturally live, feed, reproduce, etc. Examples: ocean, rainforest, deserts. An ecosystem has two components: living and non-living organisms which interact with each other to maintain homeostasis. The primary difference between the two is the presence of interaction between the things in the environment.4. Energy5. Producers6. Sun7. (No choices provided) One of the top factors that threaten the survival of species is caused by humans, man-made phenomena. 8. Answer: Polar bears. Polar bears are endangered species and there are only approximately 20,000-30,000 polar bears left in the world. Their population had been decreasing due to habitat loss because of climate change. 9. Scientists based the background extinction rate on the number of known species that went extinct over a period of time in the past. They also based it on archaeological evidence of species that existed and went extinct years ago. 
4 0
3 years ago
Knowledge of the amino acid sequences is important for several reasons. What is NOT one of those reasons
kotegsom [21]

Complete question:

Knowledge of the amino acid sequences is important for several reasons. What is NOT one of those reasons

  1. Amino acid sequences determine the three-dimensional structures of proteins.  
  2. Knowledge of the sequence of a protein can help to prevent mutations.
  3. The sequence of a protein reveals much about its evolutionary history.
  4. The sequence of a protein is necessary to determine its function.

Answer:  

Knowledge of the sequence of a protein can help to prevent mutations.

 Explanation:  

<em>Amino acids connect to each other by peptidic bonds </em>to form a <em>linear polymer</em>. The number of amino acids composing the chain and the order in which they are arranged determines the primary structure of the protein.

The secondary structure is the folding that the polypeptide chain adopts thanks to the formation of <em>hydrogen bonds between the atoms that form the peptide bond.</em>

<u>Protein functions depend on their aminoacids sequences</u><u>.</u> <u>The primary structure of the proteins determines the three-dimensional one</u>. Proteins with different functions have different sequences. And among species, proteins with similar functions have similar structures.

By knowing the sequence of amino acids, we can predict the function of the protein and we can classify them into different families. Integrants of these groups have at least 25% of their sequences identical to each other.  

Also, the knowledge of the sequence allows establishing evolutionary and genetic relationships between different species.

When a mutation occurs in the sequence -an alteration in the primary structure- the protein function is modified. BUT knowing the sequence of a protein CAN NOT help to prevent mutations.

   

6 0
3 years ago
in a glass you have 76% salt water also you have an egg which is 90% water inside, which way would the water move.
Lesechka [4]
Since osmosis is the movement of water molecules from a region of higher concentration to a region of lower concentration water molecules would move out of the egg into the salt solution in the glass in order to dilute it
4 0
3 years ago
A _______ satellite records reflected wavelengths from Earth's surface.
PilotLPTM [1.2K]
The answer would be A(:
6 0
3 years ago
Read 2 more answers
Other questions:
  • _____ are within the inner membrane of the mitochondria and increase its ability to create atp.
    8·2 answers
  • Explain why polygenic traits are expressed through quantitative variation, using skin color as an example.
    5·2 answers
  • Which interaction is most likely to result in the most competition among the organisms? A. Lions and vultures eat the remains le
    5·2 answers
  • Why is it important for the basilar membrane to move? A. Movement of the basilar membrane causes neurons to spike in the ear can
    5·1 answer
  • In 1973, biologist Theodosius Dobzhansky wrote an essay titled "Nothing in Biology Makes Sense Except in the Light of
    9·1 answer
  • Why are niches important to<br> ecosystems?
    6·1 answer
  • What is shown in the image?
    13·1 answer
  • If the researcher compares mRNA from inside the nucleus to mRNA from the ribosomes, what will be found
    12·2 answers
  • Hey, So for a project my teacher wants me to come up with question for genetic code. I came up with What role does genetic code
    10·1 answer
  • A skeletal muscle's partially contracted state that is normal even when the muscle is not in use is called
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!