A) Raul has scraped his knee and noticed that after a week it had almost completely healed.
Raul wondered how the skin was able to repair itself while looking exactly the same as his noninjured skin. In 3-5 sentences explain how mitosis plays a role in healing skin after injury and is
able to maintain the look of the existing, non-injured skin. (4 points)
Mitosis is the process of cell division, where one cell produces two identical daughter cells. In the case of a scraped knee, the damaged skin cells trigger the process of mitosis. The cells near the wound divide rapidly, producing new cells that replace the damaged ones. This process ensures that the injured skin is able to heal and restore its normal structure. As these new cells are produced through mitosis, they are able to maintain the same characteristics and appearance as the non-injured skin, resulting in a seamless healing process.
A) In three to five sentences, explain the advantage of keeping some DNA needed by
mitochondria in the cell’s nucleus and some in the mitochondria itself. (4 points
The advantage of keeping some DNA needed by mitochondria in the cell's nucleus and some in the mitochondria itself lies in the ability to efficiently regulate and control the mitochondrial functions. The nucleus contains the majority of the cell's DNA, allowing for intricate control of gene expression and regulation through various mechanisms, such as transcription factors. By keeping some crucial mitochondrial DNA in the nucleus, the cell can ensure that it has a backup supply if any mutations or damage occurs in the mitochondrial DNA itself. Additionally, housing some genetic material within the mitochondria allows for quick and targeted regulation of certain mitochondrial functions without relying solely on nuclear control.
A) In 3–5 sentences, construct a summary of the process of gene expression, starting with
DNA and ending with proteins. (4 points)
Gene expression is the process by which information encoded in DNA is used to create functional proteins. It starts with the process of transcription, where the DNA sequence of a gene is copied into a complementary RNA molecule called messenger RNA (mRNA). This mRNA molecule then moves from the nucleus to the cytoplasm, where translation occurs. During translation, the mRNA is read by ribosomes, which use the information to assemble amino acids in a specific sequence dictated by the mRNA codons. As a result, a polypeptide chain is formed, which then folds into a functional protein through post-translational modifications. This protein is then used by the cell for various functions, contributing to its overall structure and enabling specific biochemical processes.
A)
Use the two images to complete the activity.b0b59241-badf-49d8-9f1e-806a44f47589.png
In three to five sentences, describe the advantages and disadvantages of these maps in
modeling mitosi