In the DNA isolation process, cells are mixed with sodium chloride (i.e. NaCl) because the sodium (Na ) neutralizes the negative charge of DNA.a. True
b. False

Answers

Answer 1
Answer:

It is true that in the DNAisolation process, cells are mixed with sodium chloride (i.e. NaCl) because the sodium (Na ) neutralizes the negative charge of DNA.

What is DNA isolation?

DNA extraction is a method of separating DNA from cell membranes, proteins, and other cellularcomponents using physical and/or chemical methods from a sample. In 1869, Friedrich Miescher isolated DNA for the first time.

The ability to extract DNA is critical for studying the genetic causes of disease and developing diagnostics and drugs.

It is also required for forensicscience, genome sequencing, detecting bacteria and viruses in the environment, and determining paternity.

Because sodium (Na+) neutralizes the negative charge of DNA, cells are mixed with sodium chloride (i.e. NaCl) during the DNA isolation process. It makes homogenization easier.

Thus, the given statement is true.

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Answer 2
Answer:

Answer:

this is true it neutralise easily


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You are given a sample of unknown cells to examine. Analysis of their nuclei reveals that each cell contains 23 chromosomes. What types of cells might these be?a. Ova
b. skin cells
c. liver cells
d. white blood cells

Answers

Answer: Ova

Explanation: When an egg cell and sperm cell join together, the fertilised egg cell contains 23 pairs of chromosomes. One chromosome in each pair comes from the mother, the other from the father.

Thomas and Julie wanted to find out which material would insulate theirteacher's coffee cup and keep the coffee hot for the longest period of
time. They first wrapped her cup with bubble wrap and recorded the
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the type of insulation
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Answers

Answer:

The type of coffee cup

Explanation:

Because the insulation changed

The type of coffee temperature can change

The students can change

The gene for hemophilia in humans is present on the X chromosome only. Which inheritance pattern does hemophilia in humans represent?Homozygous
Multiple alleles
Polygenic
Sex linked

i think its sex linked but im not sure.

Answers

If it is an X-Linked trait, the answer would have to be "Sex-Linked". If it is on the  X chromosome, it is on a sex chromosome.

Answer:

Yes, D is correct.

Explanation:

Beginning with carbon fixation, arrange the steps of the Calvin cycle in the correct order

Answers

Answer is: Carbon Fixation, Reduction Phase, Carbohydrate Formation, and Regeneration Phase.
If you have any questions about these, drop a comment!

Which list of words describes an action potential?all or none, neurotransmitters, membrane potential

membrane potential, neurotransmitters, electrical signals

electrical signals, all or none, neurotransmitters

all or none, membrane potential, electrical signals

Answers

All or none, membrane potential, electrical signals is list of words describes an action potential. Option 4 is correct.


An action potential is a rapid change in the electrical potential of a cell membrane. It is a wave of depolarization that travels down the axon of a neuron. Action potentials are "all or none" events. This means that they either occur fully or not at all.

Action potentials are triggered by changes in the membrane potential. The membrane potential is the difference in electrical charge between the inside and outside of the cell membrane. When the membrane potential reaches a certain threshold, an action potential is triggered. This threshold is called the refractory period.

Once an action potential is triggered, it travels down the axon of the neuron. The action potential causes the release of neurotransmitters at the synapse. Neurotransmitters are chemicals that allow neurons to communicate with each other. They bind to receptors on the next neuron, which can trigger another action potential. Option 4 is correct.

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What do I already know about chemical and physical properties and changes? Identifying Pure Substances Which of the following is a pure substance? Select all that apply. A. air
B. distilled water
C. iron sulfide
D. oxygen gas
E. seawater
F. sodium chloride​

Answers

Answer: db a

Explanation: