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qaws [65]
3 years ago
14

What are the key things to learn about a cell?

Biology
2 answers:
Bas_tet [7]3 years ago
5 0

Answer:

1. All living organisms are made up of cells.

2. Cell is the basic unit of cell.

3. New cells arise from old cells.

Explanation:

sergeinik [125]3 years ago
5 0

Answer:

1

Explanation:

all living organisms are made up of cells.

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What is the mass of 60 ml of water in this? ​
iren2701 [21]

Answer:

60 grams

60 milliliters of water weighs 60 grams. (or precisely 60 grams.

Explanation:

4 0
3 years ago
Read 2 more answers
On average, errors occur in DNA synthesis only once in every ten billion nucleotides incorporated. Which of the following does N
Nesterboy [21]

Answer:

(E) None of the above

Explanation:

All of the answers contribute to the high fidelity of DNA synthesis.

Accuracy of the DNA replication is achieved thanks to various mechanisms such as:

  • DNA polymerase activity (high processivity)-ability of the enzyme to copy long stretches of DNA
  • DNA polymerase proofreading-ability to recognize its own mistakes and fix them
  • Cell's surveillance-cell monitors its DNA status, checks for the damage
  • Mismatch Repair-cell contain repair machinery which recognizes DNA helix deformities,  removes and replaces the portion containing the mismatch etc.

8 0
3 years ago
How would you describe an allele that be expressed and determines an organisms appearance?
IceJOKER [234]
I think it would be D. Dominant
7 0
3 years ago
The DNA polymerase reaction occurs in the ________ as incoming nucleotides are added to ________ end(s) of the growing DNA chain
nasty-shy [4]

Answer:

5' → 3' direction or 3'- hydroxyl

Explanation:

DNA replication takes place in the direction from 5' to 3' prime because the template strand is read along 3' to 5' direction and complementary strand is made in opposite direction of template strand during replication.

The new nucleotide that is added on the free 3' hydroxyl end of ribose sugar by phosphodiester bond in the new complementary strand. 3' to 5' phosphodiester linkage makes the backbone of polynucleotide.

In DNA synthesis adenine pairs with thymine with two hydrogen bonds and guanine pairs with cytosine with three hydrogen bonds. So the correct answer is 5' → 3' direction or 3'- hydroxyl.

5 0
3 years ago
You have been studying a large lake ecosystem. You learn that toxins have been dumped into the water. You predict that the popul
Shtirlitz [24]

The correct answer is predatory birds.  

The flowing of toxic chemicals and heavy metals into the water body when the agricultural, industrial, and human wastes run off or are discharged intentionally into the water body is known as biomagnification. These pollutants result in genetic mutations, disease, reproductive difficulties, birth defects, death, and behavioral modifications in various marine species.  

However, the extremity of the destruction varies significantly among the species. In various circumstances, the animals close to the top of the food chain are most influenced by the procedure of biomagnification.  

Several of the harmful toxins get settle at the lower level in a water body and are then consumed by the species, which feed or live on the bottom dwellers. As these constituents are not digested, they gathered inside the bodies of the species, which consumes them.  

It signifies that the higher level predators, like fish, birds, or marine mammals accumulate more harmful concentrations of toxic substances in comparison to the animals lower on the food chain. Thus, in the given case, the more concentrated amount of toxins would be found in the predatory birds.  


8 0
3 years ago
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