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Ksivusya [100]
2 years ago
15

What are some strength and weakness of cell membranes?

Biology
2 answers:
maksim [4K]2 years ago
7 0

Answer:

1) a series of circulation cells for the tropics, (2) a series for the polar regions and (3) a very dynamic series of cells in the midlatitudes

Explanation:

Fudgin [204]2 years ago
4 0

Answer:

Some strengths of the cell membrane would be being able to have control in what comes in and out of the cell. The cell membrane is semi-permeable meaning only certain things can come into the cell. In active transport, the membrane gives proteins to passing substances.

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Choose the correct answer to complete the sentence.
djyliett [7]
The sequence of Nucleotides in a DNA molecule determine the protein that will be produced. Nucleotides are the basic structural unit of DNA.
7 0
3 years ago
Which of the following errors would result in a negative result for all samples in an ELISA (including positive controls)? Selec
mash [69]

Answer:

All errors described will result in a negative result

Explanation:

The enzyme-linked immunosorbent assay (ELISA), is a test used to detect and measure antibodies, antigens and proteins in the blood. An ELISA test uses antibodies and/or antigens that are coupled to an easily-assayed enzyme, thereby this approach combines antibody specificity with the sensitivity of simple enzyme assays. ELISA test involves an antibody or antigen that reacts to form an antigen-antibody complex, where such reaction is interpreted as a positive result. The negative results are evidenced by the lack of reaction, which may be caused by some error during the chain of reactions in the ELISA test: antigen >> primary antibody (reaction) >> functional secondary antibody (reaction) >> conjugated enzyme (reaction) >> functional substrate.

5 0
3 years ago
Sequence the following events correctly. 1. Neurotransmitter diffuses across cleft. 2. Calcium induces exocytosis of neurotransm
Misha Larkins [42]

Answer:

The correct sequence is 21543.

Explanation:

The procedure by which the signaling molecules known as neurotransmitters are discharged by the neuron's axon terminal and combines and reacts with the receptors present on the dendrites of another neuron or postsynaptic neuron is termed as neurotransmission.  

The following are the steps followed in the process of neurotransmission:  

a. Exocytosis of neurotransmitter gets stimulated by calcium.  

b. The diffusion of neurotransmitter takes place across the synaptic cleft.  

c. The binding of neurotransmitters takes place with the receptor.  

d. After the binding opening of ion channels takes place.  

e. The permeability of the postsynaptic membrane gets changed.  

5 0
3 years ago
Where is a blizzard most likely to form?
Marianna [84]

Answer:

C. Northwestern side of a low-pressure system

Explanation:

I just did the test ^^

4 0
3 years ago
Scientists studying transcription in yeast (Saccharomyces cerevisiae) created an experimental strain that produced a modified RN
SpyIntel [72]

Answer:

elongation rate of strain of S.cerevisiae during transcription.

wild-type and experimental strain not treated with soultion of amanitin will be the control group. The elongation rate of mRNA of this group must be observed.

Explanation:

Dependent variable is one whose value depends on another value. Here effect of presence of mRNA polymerase enzyme and inhibtor on elnogatino rate of mRNA is being observed. So elongation rate is the dependent variable

Control group is one where independent variable whose effect is being observed can't influence the results. In experiment 2, the effect of inhibitor is being observed. So the control group must not have that inhibitor. Other conditions must remain same for experimentan and control group.

6 0
3 years ago
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