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leva [86]
3 years ago
8

I’m not sure what it means for the cell membrane to be semi-permeable

Biology
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.

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Need help with the following questions
worty [1.4K]
MRNA: AUG AAU UUA GCG ACA
polypeptides: Met or start, Aan, Leu, Ala, Thr
1. The type of mutation that occurred in this strand of DNA is deletion. This may have happened because a small part of the DNA sequence was lost when broken ends were rejoined when the DNA was being repaired. 
2. It is not likely that these mutated genes could produce a working protein because the polypeptides were completely changed, which would cause the protein to not work properly.
3. When a seed first absorbs water, it begins to grow. The mutation could cause the plant to be unable to absorb water. Therefore, the plant would be unable to germinate. 
7 0
3 years ago
A structural gene is Choose one: A. a string of nucleotides that can be decoded by an enzyme to produce a protein. B. an organis
aivan3 [116]

Answer:

C. a string of nucleotides that can be used as a template to produce a RNA that codes for a protein.

Explanation:

A gene is a specific sequence of DNA containing genetic information required to make a specific protien and  is a string of nucleotides (DNA in cells) that can be used as a template to produce a RNA (by transcription) that codes for a protein. The produced RNA might be the end product (for example some transfer RNA's) or might be further translated into a protein. An organism's entire complement of DNA is its genome.

3 0
3 years ago
What type of energy transfer is made possible by a nine-volt battery in a calculator?
AURORKA [14]

C. chemical to electrical
5 0
3 years ago
depending on the environment the plant is in, more or less gas may be produced. suggest a method for measuring the rate of gas p
makkiz [27]

Answer: The correct method would be - to collect the gas in an inverted graduated cylinder. Explanation: Place the aquatic plant under the mouth of the graduated cylinder and gather the gas by the water displacement that is delivered by the cycle of photosynthesis. At that point measure, the volume of gas gathered at different times. An individual could consider the impact of temperature, the measure of light, and the accessibility of supplements as components that may influence the pace of gas creation.

6 0
2 years ago
Where is the carbon taken in by plants during photosynthesis stored
Irina18 [472]

Answer:

Leaves, stem, and roots

6 0
3 years ago
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