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elixir [45]
3 years ago
15

What substances can get through the membrane? What type of transport is this?

Biology
1 answer:
Serga [27]3 years ago
8 0

Answer:Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly. Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly.Semipermeable membranes, also termed selectively permeable membranes or partially permeable membranes, allow certain molecules or ions to pass through by diffusion.

Explanation: hope that helps

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Consider a situation in which the enzyme is operating at optimum temperature and pH, and has been saturated with substrate. What
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Answer:

The correct answer is option C, that is, increase the concentration of the enzyme.

Explanation:

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In the given case, if the enzyme gets saturated with the substrate, and is working at optimum pH and temperature, then to enhance the rate of the reaction the only thing that can be done is to enhance the concentration of the enzyme. However, further stimulation of some of the enzymes can be done with the addition of allosteric activators in the reaction, otherwise, enhancing the concentration of the enzyme is the only way.  

8 0
3 years ago
Six centromeres are observed in a prophase cell from an insect,how many pairs of chromosomes are present​
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<u>Answer:</u>

<em>Six centromeres are observed in a prophase cell from an insect, there are </em><u><em>20 pairs of chromosomes present</em></u><em>. </em>

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<em>Centromeres is defined as the part of the DNA</em> which are held responsible for the directional changing of chromosomes.

And these chromosome gets divided into <em>2 daughter cells while undergoing the process of mitosis and meiosis. </em>

<em>Chromosome is basically defined as a thin structure</em> as of a threadlike which is made out of nuclei acid and protein which is <em>located at the nucleus of various living cells</em>

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