Answer:
The same gene encodes both proteins by using different combinations of exons in the pre‑mRNA via alternative splicing.
Explanation:
According to the question, two different proteins (one with 56 amino acids and the other with 82 amino acids) are found to be encoded by the same gene. This is possible due to a process called ALTERNATIVE SPLICING.
Alternative splicing is a phenomenon whereby the protein-coding region of a gene called EXON is manipulated in such a way that variety of proteins emanate from a single gene. This manipulation includes the removal or inclusion of EXONS in the gene, so as to give rise to different combinations of mRNA, hence, different proteins will be translated from the different mRNA from the same gene.
In this case, exons were removed from one mRNA to have lesser amino acids (56) in the translated protein while exons were included in the other mRNA to have more amino acids (82).
The same gene can encode two different proteins via mechanisms such as the use of different combinations of exons in the pre-mRNA through alternative splicing, and the gene using multiple 3′ cleavage sites in the pre‑mRNA.
The subject of this question is Alternative Splicing, a processing event in biology that allows a single gene to code for multiple proteins. This process is possible due to the gene's complex structure comprised of multiple exons and introns. Two possible explanations for the same gene encoding two different proteins are through the use of different combinations of exons in the pre‑mRNA via alternative splicing, and the gene using multiple 3′ cleavage sites in the pre‑mRNA. The first mechanism occurs when the gene mix and matches exons during RNA splicing, leading to different mature mRNA molecules which code for different proteins. The second mechanism suggests that the same gene encodes different pre-mRNAs, and the different 3' cleavage sites determine the size of the encoded protein.
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Answer:
positive feedback (exacerbating feedback, self-reinforcing feedback) is a process that occurs in a feedback loop which exacerbates the effects of a small disturbance.
b. False
Answer:
B. False
Explanation:
Life history characteristics and survivorship patterns within a species are pre-set but may be changed according to the changes in environmental conditions needed for growth and reproduction. Allocation of energy to reproduction or other processes varies according to food availability, temperature, rainfall, etc.
Abundant resource availability favors the production of a large number of smaller offspring while limited resources make a population to produce a small number of larger progeny to increase the survival rate.
Example: Clutch size in birds is adjusted to obtain the maximum survival of progeny.
b. The nose
c. The pharynx
Answer:
c. The pharynx
Explanation:
The pharynx is a tubular organ that begins in the funnel-shaped neck down the neck, extending from 12 to 15 cm in length and about 35 mm at its onset and about 15 mm at the end. its ending. It has communication with the esophagus, nasal passages and the ears. The pharynx is located behind the nasal passages and in front of the cervical vertebrae, remains attached to the larynx and esophagus.
Simply put, we can say that the pharynx is a funnel-shaped passageway that connects the nasal and oral cavities to the "voice box," also known as the larynx.
Answer:
A heterogeneous mixture of water, carbon dioxide, oxygen, glucose molecules
At a molecular level, looking at a tree involves observing atoms and molecules that combine to form more complex structures such as cells, tissues, and organs. These microscopic structures support the tree's growth, function, and ability to adapt to its environment. Thus, a tree represents various levels of biological organization.
Molecularly speaking, when you look at a tree you're witnessing an array of complex structures that form the basis for life. This includes atoms, the smallest and most fundamental units of matter that form molecules. Many biologically important molecules in the tree are macromolecules, large molecules formed by polymerization where smaller units called monomers combine. These molecules are significant components of the tree's cells which are the fundamental building units of life.
Additionally, what you're also seeing are elements of the tree's structure including tissues and organs that are formed by these cells. For instance, the tree's leaves contain specialized cells like guard cells which help regulate gas exchange. On a larger scale, these molecules and cells also contribute to the overall health, function, and resilience of the tree in its ecosystem.
Therefore, when you look at a tree, you're essentially witnessing numerous levels of biological organization. These range from the level of molecules and cells up through tissues and organs, to the entire tree or organism itself. This allows the tree to grow, function, and adapt to its environment.
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Explanation:
the probability of blood types that their offspring would have is
B. 2/4 - 50%
A 2/4 - 50%