Everyone’s skin contains about the same number of melanocytes even though people come in many different colors. How is this possible? HINT Think about regulation of gene expression.

Q: In plants, what are totipotent cells? cells from plant embryo young cells that can differentiate…

A: Cell potency refers to a cell's ability to differentiate into different types of cells. The greater…

Q: 1.How can tissue be generated from stem cells 2. What is totipotent and pluripotent? 3. What…

A: Stem cells are the embryonic cells. These are the raw materials from which the cells can be formed.

Q: Cell injury results when cells are stressed so severely that they are no longer able to adapt or…

A: We know that Cells are described as an organism's basic unit both in terms of structure and…

Q: Which of the following molecules would you add to skin cells to reduce the chance of skin cancer?…

A: Cancer is an abnormal growth and uncontrol division of cells that spreads in the body and the…

Q: Some male veterans of the Gulf War in Iraq claim that their children have birth defects that were…

A: Meiosis is the process in which sex cells divide and create new sex cells with half the number of…

Q: 1. describe the shape of the human blood cells. name 2 structures that are present in plant cells…

A: Human Red blood cells are those cells which are present in blood and play an important role in…

Q: Radiation and chemotherapy drugs preferentially killcells that divide frequently, most notably…

A: Answer- There are multiple ways to tackle cancer like chemotherapy and radiation therapy. They both…

Q: 8

A: Cancer It is defined as growth of abnormal cells characterized by cellular malfunction.…

Q: Sometimes people refuse treatment for cancerDo you think people should have the right to do that?…

A: The quantity of patients that decline customary malignant growth treatment is adequately significant…

Q: 1. Which one of the following statements correctly defines the concept of gene expression? Gene…

A: NOTE: Dear student, Since you have posted multiple questions, we will provide the solution only to…

Q: What steps can be taken to reduce your risk of cancer and why?

A: Cancer is defined as growth of abnormal cells characterized by cellular malfunction. Classification…

Q: In the images above, use the scale bar to deduce what are you most likely to be looking at. What do…

A: Blood vessels are part of the circulatory system that function to transport blood throughout the…

Q: 41. Epithelial tissues grow rapidly through-out life for all of the following reasons except: a.…

A: Epithelial tissue occurs at the exposed external and internal surfaces of the body part and form…

Q: 2. What is a checkpoint? Give an example and say what happens at that checkpoint.

A: The objective of this question is to understand the concept of a checkpoint in the context of…

Q: You are studying a gene that makes a protein product that is important to vision. In which cell…

A: Bone marrow cells of an adult: These cells are primarily involved in hematopoiesis, which is…

Q: 3. What might happen to a cell whose DNA is destroyed? What might happen to a cell whose DNA is…

A: Cell whose DNA is damaged- Every cell in our body's DNA is continually at risk of being damaged.…

Q: 3. Tumor derived growth factor B (TGFB) is a secreted protein that has a diverse range of blological…

A: TGF-β (Transforming Growth Factor-β) employs the Smad proteins as the intracellular mediator of…

Q: If your nerve cells and skin cells have exactly the same genes, how can they be so different in…

A: Answer: NERVE CELLS = These are cells used to transfer the neural message to the brain , via…

Q: 4. Is the G, phase a truly resting phase? If the cells in G, are not truly resting, why do you think…

A: A cell cycle is a progression of occasions that happens in a cell as it develops and isolates. A…

Q: 4. Give an example of cell-to-cell communication that relies on the cells coming into contact with…

A: Gap junctions in animals and plasmodesmata in plants are tiny channels that directly connect…

Q: The mannose 6-phosphate receptor is located predominantly in endosomes and the TGN, but about 10% of…

A: (a)Mannose-6-phosphate (M6P) is labeled with lysosomal enzymes in the ER and binds to the M6P…

Q: 6- What are the functions of growth factors?

A: Growth factors (GFs) are naturally occurring soluble, secreted polypeptides having the function of…

Q: what are the important functions of apoptosis?

A: Apoptosis is a common process through which programmed cell death takes place. There are two forms…

Q: EXERCISE 3 PHASES OF MITOSIS The phases of mitosis depicted are out of order. Work with a group of…

A: To maintain the overall quality of life, the cells are being formed, repaired and moved into…

Q: 2. Indicate, using the genetic code, the sequences of amino acids of a part of tyrosinase coded by…

A: Albinism is an inherited genetic disorder that causes the body to produce little or no production…

Q: 1. How does skin cancer not exert enough evolutionary pressure to account for darker skin in humans?…

A: The sunlight that reaches an organism comprises two kinds of harmful rays that include long wave…

Q: What is the role of   epithelial-mesenchymal transition” (EMT) and  MET in metastasis?

A: Epithelial mesenchymal change (EMT), a developmentally conserved formative program, has been…

Q: 2. Which of the following can result in cell migration at the end point of signal transduction? O…

A: cell migration is the movements of cells in a directed manner either by : chemical signals…

Q: 2

A: Cancer It is defined as growth of abnormal cells characterized by cellular malfunction.…

Q: 2. Imagine that you have given blood, but a sample of your red blood cells is accidentally stored in…

A: Red blood cells mean RBCs are responsible for the red color of blood.RBC is placed in saline water…

Q: 1. What are proteins A and B in this figure below? 2. What is the role of Protein A in this pathway,…

A: The cell cycle control system is composed of cyclin and cyclin-dependent protein kinases. They…

Q: 1. David's body temperature rises above normal during the surgery (hyperthermia). How does skeletal…

A: Malignant hyperthermia is a reaction to anaesthetic drugs.   The reaction include: high body…

Q: Below is a picture of the base of a hair. The section that is referred to as the matrix is shown in…

A: Skin is the largest organ of the integumentary system that covers the body and provides three main…

Q: 9. Explain how a small amount of growth factor can mediate an amplified signal inside the cytoplasm…

A: Signal transduction pathways translate signals received at the cell's surface into cellular…

Q: Describe the Jak/STAT signal transduction pathway

A: Answer :- JAK/STAT signalling  pathway sends signals from the extracellular flagging pathway to the…

Q: 2. Consider the scenario where a DNA mutation occurs in a person's skin cells, where the gene p53…

A: ANSWER: Because p53 is a gene that helps prevent cancer from developing, having a mutation in it…

Q: 4. Briefly describe the 2 reasons why the Inuit people exhibit somewhat darker skin levels than…

A: Ultraviolet radiations help in the synthesis of Vitamin D in the body and hence they are considered…

Q: Describe the MAP kinase activation pathway

A: Protein kinases or PTKs are the regulatory enzymes that activate proteins by phosphorylating them at…

Q: What did the virus conclude? , Which virus was used? , How did the virus help in the conclusion?…

A: A virus is a submicroscopic infectious agent that replicates only inside the living cells of an…