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Brut [27]
3 years ago
14

Plants that can live in water-soaked soil are able to survive in the _____________ ecosystem.

Biology
1 answer:
Rina8888 [55]3 years ago
8 0

Answer:

plants that can live in water-soaked soul are able to survive in the aquatic ecosystem

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Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"? Sel
Mila [183]

Answer:

Cyclic AMP and calcium may be second messengers.

Explanation:

these are signalling molecules that are located inside the cells,They are releases  when cells   are in contact with  signals from an extracellular molecule. the extracellular molecules that cause the chemical  reaction  in an external environment  in the second messenger are called first messenger.

<u>the basic mechanisms of second messenger involve the binding of ligands to the cell membrane receptors( usually a trans membrane protein).causing   conformational  change in the receptor protein. The latter change affect the structural and functional activities of the receptors protein with a consequent  production of second messenger,</u>

<u />

Response of the cells  to the first messenger my cause different form of cellular reactions; the cells may  undergo depolarization  with influx of out flux of ions, differentiate to specialized cells  or migrate to another location.

Examples of first messenger are hormones and neurotransmitters, while calcium ions, cyclic GMP,AMP, diaclyglycerol are examples of first messengers.

Most first messengers are peptide hormones.Some may be streroid, However, the hydrophilic nature of the peptide hormone restrict their movement, at the cell membranes. Therefore most first messengers made of  peptide  are first converted to second messenger to  bring about their signalling effects.The usually mark the beginning of cascade events by second messengers.

Second messengers are usually classified based on their polarity and molecular form this include the

<u> hydrophobic molecules</u> ;diacyglecerol,phosphatdylinotisols. These diffuse  through the membrane  into intramembrane space of cells cause signalling effects in the cell.

<u>the hydrophiliic  molecul</u>es  are  located in the cystol  of cells. Example are  Cylic AMP. GMP, Calcium,

N02, CO,H2S are <u>polar molecules</u> that easily diffuse into the cells to cause signalling effects, they are the third Classification of second messengers.

6 0
3 years ago
Read 2 more answers
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

7 0
3 years ago
All the black widow spiders on a 5 acre farm
pogonyaev
The answer is B. Population
8 0
3 years ago
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Suppose that a portion of double-stranded DNA in the middle of a large gene is being transcribed by an RNA polymerase. As the po
babunello [35]

<u>Answer:</u>

CCGAGU

<u>Explanation:</u>

DNA transcription:

DNA transcription is the process through which DNA double helical strand is converted into single stranded RNA molecule.

During transcription two strands of DNA are named differently i.e Template strand and coding strand.

Template strand:

Strand from which RNA is producing is known as template strand while

Coding strand:

The strand which is opposite to the template strand is known as the coding strand. Coding strand is the DNA strand whose nucleotide sequence resembles to the RNA transcript base sequence except thymine which is replaced by uracil.

Correct Answer:

Template strand from 5' to 3' reads GGCTCA. and

In this question CCGAGT is coding strand.

RNA sequence is same as coding sequence except T which is replaced by U so sequence of RNA becomes

CCGAGU

8 0
3 years ago
Peanut seedlings were grown under identical conditions. What factor could account for differences in height among the seedlings?
Vladimir [108]
The correct answer of the given question above would be GENETICS. When peanut <span>seedlings were grown under identical conditions, the factor that could count for differences in height among the seedlings is GENETICS. Hope this answer helps you. Thanks for posting your question.</span>
4 0
3 years ago
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