Why are steroids able to diffuse across the plasma membrane? a. Their transport protein moves them through the membrane. b. They are amphipathic, allowing them to interact with the entire phospholipid. c. Cells express channels that let hormones flow down their concentration gradient into the cells. d. They are non-polar molecules.

Q: Which of the following enzymes plays a role in controlling the the half-life of cGMP? (Hint: It is…

A: cGMP or cyclic GMP is cyclization product of GTP by an enzyme called Guanylyl cyclase. This enzyme…

Q: Epidermal growth factor (EGF) signals through a receptor, tyrosine kinase. EGF signaling promotes…

A: An epidermal growth factor is a protein-coding gene which is responsible for controlling the…

Q: How does an intracellular receptor regulate gene expression in the cell? Describe briefly what…

A: Intracellular receptors found inside the cell. Typically in the nucleus and cytoplasm. They are…

Q: This question pertains to membrane transport & cell signaling.  Give an example of animals and…

A: Cell signaling is used as a mechanism for communication between cells. The signaling cell releases…

Q: A mutation in HER2 that causes receptor dimerization in the absence of signaling molecules. Would…

A: Answer - B. Increases proliferation HER2 (human epidermal growth factor receptor 2) is a gene it…

Q: Consider the structure of cholesterol, a small hydrophobic molecule with a sterol backbone similar…

A: Cholesterol is considered a hydrophobic molecule, which acts as a membrane compound that helps in…

Q: kinase inhibitor that binds Kinase X and prevents ATP binding. Kinase X is part of an important…

A: Proteins are the ultimate functional machinery of a cell. On the surface it appears that they…

Q: If a signal activates an intermediate protein it would be considered______ of a protein? a.…

A: Cellular signalling is a complex system that allows cells to communicate with one another and…

Q: One advantage chemical signaling has over electrical signaling is thata. reaction to stimuli can…

A: Cell to cell communication is very important for the normal functioning of the body. It helps in the…

Q: What is the role of executioner proteins in apoptosis?a. They kill the cell by destroying its…

A: Apoptosis is a cellular process which is a programmed cell death mechanism. Whenever any cell starts…

Q: What kind of domain is involved with intracellular signaling, cytoskeleton remodeling, and are able…

A: Pleckstrin homology domain is a protein domain consisting approximately 120 amino acids.

Q: What makes it possible for a neurotransmitter to act on a cell? Select one: a. Gene transcription…

A: Cell signaling is part of any interactive activity that directs the basic activities of cells and…

Q: A cell biologist asks you to image a protein of interest tagged with eGFP in a living cell. Describe…

A: Introduction :- eGFP is engineered ( enhanced) green fluorescent protein . The normal GFP protein is…

Q: All known hormones in plants are regulated by proteasomes. Which of the following describes the…

A: Promoter molecules are activator that increases the transcription of the genes while suppressor is…

Q: Name the process by which hormones and digestive enzymes are released? A. Phagocytosis B.…

A: Hormones are the chemical messenger secreted by the endocrine glands of the body. They travel…

Q: What happens when an agonist, instead of the endogenous (natural) hormone, binds to the hormone…

A: Hormones are chemical messengers that interface with receptors present on the outside of a cell…

Q: How does the signaling cascade initiated by activation of the Gas protein enter the nucleus to…

A: Signal transduction requires a receptor through which a ligand interacts and transmits its…

Q: What happens in the reception phase of cell signaling when protein signal molecules are present?…

A: The cells in a multicellular organism communicate with each other through various signaling…

Q: For cellular transduction, why is it useful that phosphorylation cascades have a series of protein…

A: Phosphorylation plays an essential role in regulating cellular processes like growth, cell cycle,…

Q: Give typing answer with explanation and conclusion  Which molecule performs the primary signal…

A: The ability of a cell to receive, process, and communicate messages with its surroundings is known…

Q: What class of enzymes catalyze the phosphorylation of amino acid residues in proteins?   a.…

A: Enzymes: These are natural biocatalysts that accelerate reaction to form products by decreasing the…

Q: Chronic liver disease is common among HIV-infected patients, and is increasingly a cause of…

A: HIV stands for Human Immunodeficiency Virus. It is a positive strand enveloped RNA virus, belongs to…

Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.