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disa [49]
3 years ago
14

When the DNA molecule folds, coils and super coils to fit in the cell what structure does it form?

Biology
2 answers:
ch4aika [34]3 years ago
6 0

Answer:

it is a) chromosomes

Alexeev081 [22]3 years ago
5 0

Answer:

<h2>A. Chromosome</h2>

Explanation:

In intermediate phase of cell cycle, DNA replication occurs (in S-phase), so in inter phase, DNA become unfolded and in relaxed state and is available for replicating machinery.

When cell enter into prophase, DNA folds, coils and super coils and finally become in condensed form, which can be seen by microscope.

So this compact form of DNA is called as chromosome.

In humans. there are total 46 chromosomes.

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Which of the methods of transport into or out of the cell require energy? Which do not?
Contact [7]

Answer:

passive transport and diffuision

Explanation:

it  requires no energy from the cell. Examples include the diffusion of oxygen and carbon dioxide, osmosis of water, and facilitated diffusion. diffusion does not.

4 0
3 years ago
In his study of pea plants, Gregor Mendel used which method to produce offspring?
bija089 [108]
He used Selective Breeding
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The set of all populations inhabiting a certain area is called a(n):
zheka24 [161]
A community refers to the total number of populations that inhabit a specific location or area. This is part of the levels of organization of life. Arranged from the least complex to most complex it falls 8th in the category. Below are the organization of life:<span>

a. Organelles - the basic part of a living organism. It refers to the different structures of the cell, whether prokaryotic or eukaryotic. (Ex. Mitochondria, nucleus)
b. Cells - building blocks of life that are composed of different molecules responsible for the function of an organism. (Example: prokaryotic, eukaryotic cells)
c. Tissues - combinations of cells that carry out a specific function in an organism. (Example: Human skin)
d. Organs - collections of tissues that perform specific functions. (Ex. heart, lungs)
e. Organ Systems - composed of interconnected organs that function as a whole. Many organisms, particularly mamamals, are composed of organ systems. (Ex. respiratory, circulatory systems)
f. Organisms – individual entities that specifically make-up a population. (Ex. Each tree in the forest is an organism, each animal in sea is an organism)</span>
g. Population – species living within a specific location. It could be the same or different species that inhabit a place. (Ex. Birds are species in the forest as well as bears)
h. Community – refers to the total number of populations that inhabit a specific location. (Ex. All of the trees, insects, birds that inhabit the forest are a community)
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8 0
3 years ago
Read 2 more answers
Pls pls pls help!! i’ll give brainliest
ankoles [38]

Answer:

materials move against a concentration gradient

7 0
3 years ago
Sodium ions, oxygen (O2), and glucose pass directly through lipid bilayers at dramatically different rates. Which of the followi
Elodia [21]

Answer:

The correct order, from fastest to slowest, for the passage of molecules and ions through the cell membrane is oxygen, sodium ions, glucose (option D).

Explanation:

The plasma membrane is a lipid bilayer, with glycoproteins and membrane proteins, which constitutes a semi-permeable barrier to the passage of substances into and out of the cell.

The speed with which a substance can pass through the membrane depends on its chemical properties -hydrophilic substances pass through with greater difficulty than lipophilic ones- requiring in some cases specialized transport mechanisms. The different rates with which a substance passes depends on this.

  • <em>Oxygen (O₂) </em><em>passes through simple diffusion, depending on a concentration gradient. It's the molecule that passes through the membrane the fastest. </em>
  • <em>In second place, there would be the </em><em>Na⁺ ions</em><em> -charged atoms- that cross the membrane by facilitated diffusion, through specific ionic channels. </em>
  • <em>The </em><em>glucose</em><em> molecule, being larger, requires the use of transport proteins, being its passage through the membrane slower with respect to oxygen or sodium.</em>

Undoubtedly, molecular weight and affinity for the plasma membrane are determining factors for the passage of molecules through the lipid bilayer.

Learn more:

Simple diffusion and active transport  brainly.com/question/6420224

4 0
3 years ago
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