Which of the following is a yield from a tree? Roots Timber Branches Vegetables

Which of the following best explains how the expression of a eukaryotic gene encoding a protein wil differ if the gene is expres

Ivan

Answer: c. The protein will be made but will not function, because prokaryotes cannot remove introns.

Explanation:

Eukaryotic cells are cells that have membrane-surrounded organelles, such as a nucleus which is an organelle that stores the DNA, the genetic material. On the other hand, prokaryotic cells do not have a nucleus, and the genetic material is a single molecule, usually circular and closed and double-stranded, which is located in a sector of the cell known as the nucleoid (meaning "similar to the nucleus"), which does not imply the presence of a nuclear membrane.

A gene is a unit of information at a DNA locus that codes for a protein. To synthesize that protein, DNA must be transcribed into messenger RNA (mRNA), and that mRNA is read by ribosomes in a process called translation or protein synthesis. The difference between protein synthesis in prokaryotic and eukaryotic cells is that in prokaryotes, transcription and translation take place directly in the cytoplasm since there is no nucleus. In eukaryotes, transcription takes place inside the nucleus, to generate mRNA. This mRNA molecule is then directed to the cytoplasm where translation happens.

a. In prokaryotic cells, ribosomes are produced in the cytoplasm, whereas in eukaryotic cells they are generated in the nucleolus within the cell nucleus. So they both have ribosomes and they are used to make proteins, then this option is true.

b. RNA polymerase initiates transcription of all different types of RNA (mRNa, ribosomal RNA and transfer RNA). However, there are three RNA polymerase variations, each one translate a different type of gene. But, prokaryotic RNA polymerase can translate eukaryotic genes. Then this option is not true.

c. Prokaryotic cells don't have introns because those cells do not perform a post-transcriptional RNA modifications, only done by eukaryotic cells. One of the modifications is the excision of introns in RNA. An intron is a region of DNA that is part of the primary RNA transcript, but unlike exons, they are removed from the mature transcript prior to translation. So, this remotion does not happen in prokaryotes because they just don't have introns. Also, in prokaryotic cells. the translation and transcription machinery is coupled. So, the transcription and translation occurs simultaneously, there will be no remotion of introns then the protein will be synthesized differently, since the reading frame is changed. Remember that each codon (set of three nucleotides) codes for an amino acid. So if the gene sequence is different because certain sections of the gene have not been removed, the protein will be different, and probably it will not function. This option explains how the expression of an eukaryotic gene encoding a protein will differ if the gene is expressed in prokaryotic cells.

d. The genetic code is the set of rules that defines how a sequence of nucleotides in RNA is translated into a sequence of amino acids in a protein. This code is common to all living organisms, although there are small variations, and it has a unique origin and is universal. So, the code defines the relationship between each sequence of three nucleotides, called a codon, and each amino acid. The sequence of genetic material is composed of four distinct nitrogenous bases, which are represented by letters in the genetic code:

Adenine (A)
Thymine (T)
Guanine (G)
Cytosine (C)
Uracil (U), only in RNA (instead of T)

So, the genetic code is the same for eukaryotes and prokaryotes. So this option is not true.

7 0

3 years ago

Mutations result in changes to genotype that can result in changes in phenotype. Explain how a mutation causes a change in the g

Alecsey [184]

Answer:

A mutation can alter the structure/function of a particular protein, thereby also altering the phenotype resulting from this new variant

Explanation:

A mutation can be defined as a genetic change in the genome of an organism. Some mutations are capable of modifying the expression and/or structure of the proteins, while other mutations (known as silent mutations) have no effect on the resulting proteins. When mutations occur within the gene region encoding a protein (i.e., exons), they are potentially capable of producing a faulty protein. For example, a mutation can alter the Open Reading Frame (ORF) of the resulting protein, thereby inactivating it. The mutations that alter the structure and/or function of the protein can also alter the resulting phenotype associated with the expression of this protein. For example, a mutation within a gene that encodes a key enzyme can potentially alter the binding site of the protein, so the resulting mutated enzyme cannot bind to the substrate anymore. In consequence, this mutation alters the phenotype of the individual who is not more able to carry out the metabolic reaction catalyzed by the faulty enzyme.

8 0

3 years ago

ILL GIVE EXTRA POINTS AND BRAINLIEST TO FIRST ANSWERS CORRETED ALL MY POINTS.

katen-ka-za [31]

Answer:

Here your helping it's F

5 0

3 years ago

What other cells structures does mitochondria work with?

Stells [14]

I think Mitochondria will works with chloroplast.

The main function of mitochondria is to provide energy. In order to do that, it needed the oxygen and sugar that retrieved by the Chloroplast

hope this helps

3 0

4 years ago

Most of the regulated medical waste in the United States is incinerated. These incinerators are a health hazard because they rel

yaroslaw [1]

Answer:

volcanic waste dump and plastic eating bactirium to clean alot of things

also a purge to remove the overpopulation problem thus reducing the production and polution up to 10 to 50 % all over the world

Explanation:

7 0

3 years ago