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Marina CMI [18]
4 years ago
9

A genetic mutation resulted in a change in the mRNA sequence but the amino acid sequence and function of the protein were not ch

anged. Which statement best describes the genetic mutation?
A- it was a silent mutation in a coding region of DNA that caused a change in the DNA of the organism
B- it was a nonsense mutation in a non-coding region of DNA that caused a change in the DNA of the organism
C-it was a nonsense mutation in a non-coding region of DNA that caused a change in the phenotype
Biology
1 answer:
Fofino [41]4 years ago
3 0
I believe your answer would be A.) because silent mutations change the sequence of mRNA, but not the function. (Henceforth being called "silent")

Hope this helps!
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We would expect that a 15-nucleotide sequence that includes a stop codon at the end (as part of the 15-nucleotide sequence) will
slega [8]

Answer: Four amino acids.

Explanation:

RNA (ribonucleic acid) and DNA (deoxyribonucleic acid) are polymers made up of long chains of nucleotides. Thus, a nucleotide is the basic building block of nucleic acids and consists of a sugar molecule (ribose in RNA or deoxyribose in DNA) linked to a phosphate group and a nitrogenous base. <u>The nitrogenous bases can be Adenine (A), Thymine (T), Cytosine (C), Guanine (G) or Uracil (U) replacing T in RNA</u>. DNA is the molecule that stores the genetic information to synthesize polypeptides or proteins (set of amino acids). When proteins need to be created, DNA is transcribed into RNA and this RNA is translated in ribosomes to create polypeptides.

Complementarity is the ability to combine with their complement. A and T (or U) are complementary, while C and G are complementary to each other. Complementarity is the principle of replication and transcription, because it is a propery of both DNA and RNA sequences. Their the nucleotide bases at each position of the sequences are complementary, allowing cells to copy information.

Nucleotides in RNA are grouped into codons, which consist of groups of 3 nucleotides where each codon codes for an amino acid. Therefore, <u>the sequence of bases in nucleic acids determines which protein will be synthesized</u>. Protein synthesis begins with a start codon (AUG, which codes for the amino acid methionine) and ends with a stop codon (UGA, UAG and UAA). So, if there are 15 nucleotides, there are 15 bases. Since they are grouped in groups of 3, we will have a polypeptide of 4 amino acids.

<u>3 nucleotides form a codon, so 12 nucleotides form 4 codons giving 4 amino acids. The last codon, is formed by the last 3 nucleotides and form the stop codon that stop protein synthesis</u>.

7 0
3 years ago
Which goes where ? Mitosis Vs. Meiosis
nika2105 [10]

Answer:

Mitosis, Meiosis, and both are written below

Explanation:

Mitosis: produces more somatic (body) cells, purpose is for healing and growing, the daughter cells are exact replicas

  • This is because mitosis occurs in body cells and is used for growth, so all the daughter cells are the same.

Meiosis: results in sex cells (gametes), results in eggs and sperm, purpose is for creating new individuals (eventually), each daughter cell is different, has 2 separate division stages

  • This is because meiosis occurs in gametes and is used in reproduction.

Both: Chromosomes need to replicate before the whole process begins, a form of reproduction

  • This is because both are reproducing (they are dividing) and DNA must be replicated so each daughter cell has it.  

8 0
3 years ago
Which is an example of temporal isolation?
Ivan
One species is nocturnal, and the other species is not.


http://quizlet.com/51808791/biology-1407-ch-24-flash-cards/

8 0
4 years ago
Our current understanding of evolution is called a theory because itches been
Artemon [7]

Answer:

Supported repeatedly as new discoveries have been made.

Explanation:

5 0
3 years ago
Asexual reproduction is?
alina1380 [7]
Asexual reproduction is when the offspring is produced by a single organism (aka "parent") and only has the specific traits of that organism from which it was produced. Sexual reproduction is when the offspring is produced by two parents/organisms and have different traits or a mix of traits from the parents.
Hope this helped!

~Wolfe<3
6 0
3 years ago
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