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12345 [234]
2 years ago
13

What is the function of a selectively permeable membrane? A. It allows no large molecules to leave the cell and all large molecu

les to enter. B. It allows some molecules to enter the cell and blocks entry to others. C. It allows all molecules to enter the cell but blocks them all from leaving. D. It allows all molecules to enter the cell and allows all molecules to leave.
Biology
2 answers:
alexandr1967 [171]2 years ago
6 0

Answer: Option b: it allows some molecules to enter the cell and block entry to others.

Explanation: selective permeability allows those molecules to enter the cell which are small, uncharged. Large molecules pass slowly.

Maslowich2 years ago
4 0
B. It allows some molecules to enter the cell and blocks entry to others.
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What are some differences and similarities between solar energy production and photosynthesis?
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Answer:

The main difference between photosynthesis and cellular respiration is that photosynthesis is an anabolic process, where the synthesis of organic compounds occurs, storing energy whereas cellular respiration is a catabolic process, where the stored organic compounds are utilized, producing energy.

Explanation: hope it helps!

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3 years ago
The human body can absorb some of the _____ that is synthesized by intestinal bacteria.
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The answer to this question would be: vitamin

Some bacteria can produce vitamin K2 in the intestine. Other bacteria also able to change vitamin K1 into vitamin K2. But the amount produced is not much, so human still need to fulfill it from the diet. Vitamin K has a role in calcium regulation and in blood clotting pathway.
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2 years ago
What do we call the process where part of the DNA is saved during replication?
Nataly_w [17]

Answer:

The process where part of the DNA is saved during replication is known as semi conservative replication.

Explanation:

During cell division, a cell must first replicate its DNA (Deoxyribonucleic acid).  When a cell divides into daughter cells , the DNA of the parent cell must be copied because DNA contains the genetic material of an organism. DNA replication is the process in which DNA is copied  during the cell  division cycle.  During replication, the complementary strands of the original double helix DNA are separated and one of the two strands in the original molecule is saved in the new DNA molecule. Thus the new DNA molecule is made of an original strand and a newly synthesized strand. So the DNA replication is known as semi conservative replication. Each strand of the original DNA molecule is referred as the template strand because it provides information for the production of newly synthesized strand. It takes place inside the nucleus of a cell during the s stage  of the cell cycle. During replication, helicase enzyme breaks the hydrogen bonds between the complementary bases (Adenine with Thymine, Cytosine with Guanine) and unwinds the double helix of DNA. The two separated strands create a Y-shaped replication fork and act as templates for the synthesis of new strands of DNA. Enzymes known as DNA polymerases create the new strands.

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3 years ago
An experiment testing the hypothesis that nitrogen markers shoot farther than carbon dioxide markers resulted in conflicting tes
Natasha_Volkova [10]

Answer:

They should think of an alternative explanation for their results.

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The next step that the scientists should take is to interpret why their hypothesis went wrong. The researchers should look for patterns in their observations and provide an alternative explanation for the results which occurred. Based on the results and their understandings, they should further make another hypothesis and check for its authenticity.

In scientific researches, the results of a hypothesis generally do not get the expected results but this leads to new findings and discoveries.

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3 years ago
These are the three main organs that make up the plant body.
liraira [26]

Answer:

Chlorophyll-to trap enough light for photosynthesis

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3 years ago
Read 2 more answers
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