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3 years ago

Why is the ability of the cell membrane to be "picky" important?

Biology

1 answer:

Yuliya22 [10]3 years ago

5 0

Answer:

Hi there!

Your answer is:

It is very important for the cell membrane to be semi-permeable because the ability to pick and choose what comes in and out of the cell keeps the cell safe! The membrane can choose to block out nasty germs and can also choose to get rid of internal waste.

An example of when this is important is in this scenario:

Let's say the cells are in a really salty solution. Naturally, salt will want to pull the water out of the cell. If the membrane wasn't semi permeable, the water would listen to the salt and leave the cell. This would cause cell death. BECAUSE the membrane is semi permeable, they can choose not to give the salt any water, keeping them alive

Hope this helps

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shutvik [7]

Hey there!

There are two genders known to science, male and female. People nowadays have the ability to alter their gender, but in the end, there are really only two.

I hope this helps!

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3 years ago

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Why does the body of a multicellular organism grow larger through cell division rather than by simply growing larger cells? give

den301095 [7]

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3 years ago

Where to rescue workers get their energy

Papessa [141]

The rescue workers can get energy to the batteries in their equipment during rescue missions by using a generator to convert the kinetic energy to potential energy. Potential energy is then stored in the battery.

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3 years ago

Explain how the triplet code of dna is transcribed and translated in the synthesis of proteins

timama [110]

Ok this is going to be a long answer lol

Translation is the process by which a protein is synthesized from the information contained in a molecule of messenger RNA (mRNA). During translation, an mRNA sequence is read using the genetic code, which is a set of rules that defines how an mRNA sequence is to be translated into the 20-letter code of amino acids, which are the building blocks of proteins.

During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA

I hope this helps :)

4 0

3 years ago

Given the following cross TtYyRr x TtyyRr (T = tall; t = short Y = yellow; y = green R = round; r = wrinkled), what proportion o

mihalych1998 [28]

Answer:

3/32 ttyyR-

Explanation:

Cross: Tall, Yellow, Rounded individuals with a tall, green, rounded individual

Parentals) TtYyRr x TtyyRr

Gametes) TYR, TyR, TYr, Tyr, tYR, tyR, tYr, tyr (Parent one)

TyR, TyR, Tyr, Tyr, tyR, tyR, tyr, tyr (Parent two)

We need to know what proportion of offspring is expected to be short plants with round, green seeds. So we need to identify the gametes for these traits. The genotypes are:

Shot → tt
Round → RR or Rr
Green → yy

⇒ Parent one can provide gametes tyR and tyr

⇒ Parent two can provide gametes tyR and tyr

(1/8 tyR x 2/8 tyR) + (1/8 tyR x 2/8 tyr) + (1/8 tyr x 2/8 tyR) =

2/64 ttyyRR + 2/64 ttyyRr + 2/64 ttyyRr =

1/32 ttyyRR + 2/32 ttyyRr =

3/32 ttyyR-

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3 years ago