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densk [106]
3 years ago
7

Why is it important for dna to be duplicated before mitosis

Biology
2 answers:
Ulleksa [173]3 years ago
8 0
<span>If it didn't, one cell would end up with the original DNA, the other wouldn't be a functional cell, because it would lack DNA. If the DNA was split between the two cells, neither cell would have a complete copy. 
</span>send me a message

Annette [7]3 years ago
8 0
It is important because that's how it will split into two new daughter cells.
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Drag and drop the terms at the left to match the appropriate descriptions at the right. ResetHelp Composed of phospholipid bilay
quester [9]

Answer: The appropriate description is matched against the components of the cell below.

1) Cilia: Short, hairlike cellular extensions

2) Ribosome: Site for protein synthesis

3) Chromatid: Copy of a chromosome

4) Cristae: Folds of the inner mitochondrial membrane

5) Lysosomes: Vesicles with powerful digestive enzymes.

6) Smooth ER: Stores calcium ions in muscle cells

7) Plasma membrane: Composed of phospholipid bilayer

8) Cytosol: Intracellular fluid

9) Cytoplasm: Intracellular fluid and organelles

10) Centriole: Involved in mitosis.

Explanation:

A cell is simply defined as the structural and functional unit of an organism. It is made up of highly organized physical structures called intracellular organelles. These organelles includes:

• Ribosome

• Lysosomes

• Smooth Endoplasmic reticulum

• Plasma membrane

A type of cellular motion called ciliary movement, is a whip-like movement of CILIA on the surface of cells takes place in the respiratory airways of human.

The cytoplasm is filled with both intracellular fluid and organelles while the cytosol contains mainly dissolved proteins, electrolyte and glucose ( intracellular fluid).

7 0
3 years ago
Why is energy needed for active transport?
slavikrds [6]

Answer: The correct answer is A. Molecules are moving against a concentration gradient.

Active transport is a process in which molecules move from a medium of low concentration gradient to a medium of high concentration gradient across the cell membrane. Since molecules move against the concentration gradient, therefore, this process requires energy.

Active transport is primarily divided into two types-

Primary active and secondary active transport.

In primary active transport, metabolic energy is used directly ( Example- hydrolysis of ATP)

In secondary active transport, energy is utilized by the movement of one molecule along the concentration gradient. This movement is coupled with another molecule, which moves against the gradient.

 

5 0
3 years ago
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What is one reason that scientific names, instead of common names, help scientists to communicate about organisms?
Phantasy [73]
Because around the world we dont all speak the same so by using these names we know we are talking about the same animals.
8 0
3 years ago
Need help please ASAP!!!
Julli [10]

Answer:

D.

Explanation:

The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.

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3 years ago
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"repeated drug use and/or alcohol use after a period of improvement from substance abuse is called ________."
murzikaleks [220]
<span>"Repeated drug use and/or alcohol use after a period of improvement from substance abuse is called relapse." Relapse is the term used to describe the return to the drug or alcohol. While recovering from addiction it is common several relapses to occur. This should not discourage the patients.</span>
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3 years ago
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