In sea urchin, which step of egg and sperm recognition is mediated by sperm-activating peptides?   Sperm migration through the egg ECM   Fusion of the sperm and egg membranes   Sperm binding to the egg's ECM   Acrosomal reaction   Chemo-attraction

Q: Which of the following statements best describes the mechanism by which the ced-9 protein in the…

A: (CED-9) or Cell-death abnormality gene 9 called apoptosis regulator CED-9, found in Canorhabditis…

Q: Many insects have a “lock and key” type of genitalia in which the male reproductive structures will…

A: Reproductive isolation is an evolutionary mechanism, physiological process, and behavior that are…

Q: - Below are two cell signalling pathways that work together to regulate cell growth, proliferation…

A: The forward reaction is the one in which the reactants are decreased with time and the amount of…

Q: In the Mammalian genome , maximum number of gene code are for which receptors ?

A: Mammalian genome have about 1,00,000 genes and about 100 million nucleotide pairs of coding DNA .

Q: a) What purpose does this forward reaction serve in that pathway?  b) Does the reverse reaction…

A: The Hippo signaling pathway is an evolutionarily conserved signaling pathway that is the latest…

Q: ADH causes cells of the kidneys to insert aquaporins (leak channels for water) into their membranes.…

A: Kidney plays an important role in maintaining the osmoregularity of the body or more precisely…

Q: The epidermal growth factor receptor (EGFR) activates a complex signaling network to increase…

A: Answer  C-myc synthesis is responsible for cell growth and development and prevent apoptosis.…

Q: Genetic mutations within tight junction protein Z02 can result in symptoms only found within the…

A: The following statements are false: The tight junctions form lumens sealing the space between…

Q: - Below are two cell signalling pathways that work together to regulate cell growth, proliferation…

A: This pathway is receptor tyrosione kinase.

Q: Which answer correctly shows a signal transduction pathway? GPCR -> Active Gq -> Active…

A: Please follow step 2 for detailed explanation.

Q: Select from the drop-down menu which type of regulation is occurring in each case. The Ixb12 gene…

A: Gene regulation is a mechanism of controlling the function of gene and it's associated mRNA and…

Q: One of the key components in vertebrate limb development is the polarizing region, also known as the…

A: In the limb bud, an ectoderm layer surrounds the undifferentiated mesenchyme. Bones, tendons,…

Q: Jak Jak 1. Receptors bind cytokines, dimerize, and bind Jaks 2. Jaks phosphorylate each other and…

A: Since you have posted multiple questions with multiple sub-parts, we will solve first three…

Q: indicate if TRUE or FALSE 1. Torpedo protein is a membrane receptor 2. Binding of Gurken signals…

A: 1) Torpedo maculopathy is a circumscribed, congenital lesion of the RPE and outer retina so it's…

Q: Are any of the following feasibly linked to COVID-19 susceptibility? . Leucine zipper transcription…

A: COVID-19 is a pandemic which is caused by infection with SARS-CoV-2. Researchers found out a strong…

Q: Describe the process by which the forespore influences gene expression in the mother cell during…

A: The spore production in bacteria like B. subtilis is a proper nutritional stress events and thus…

Q: The purpose for blocking the membrane for western blotting with milk is:      to allow antibodies…

A: Blotting refers to a technique by which a biomolecule is transferred from one medium to another…

Q: Is Drosophila Toll protein a receptor that binds PAMPs?

A: Drosophila are belong to the group of Drosophilidae. The drosophila is belonged to the insect group…

Q: Let's assume there is an inhibitor that binds to all signal recognition particles (SRPS) covalently,…

A: Signal recognition particle (SRP) is very important protein that binds with the signal sequence (SS)…

Q: Which describes an enzymatic activity/biochemical function of importin-beta?     facilitate…

A: Introduction : Importin beta are known as a type of karyopherin proteins which mediates the…

Q: The protein Tau promotes formation of axonal microtubules, stabilizes them, and drives neurite…

A: Microtubules are hollow , cylindrical and consists of 13 protofilaments. It is present in all…

Q: What is the effect of pertussis toxin on G proteins?     Inhibits activation of Gαi leading to…

A: The GPCR (G-protein coupled receptor) is one of the very important cell signalling molecule. It is a…

Q: Chromosomal translocation can result in cells expressing a fusion protein with uncontrolled receptor…

A: The correct answer is Tel/PDGFR

Q: Which of the following proteins is categorized as a single-pass transmembrane protein (containing…

A: In humans, the ABO blood group system encodes three distinct carbohydrate antigens called the A, B,…

Q: Diagram (just use arrows in the same way you diagrammed in a former test a stimulus leading to the…

A: When a mammalian cell is irradiated, DNA damage occurs and the tumor protein 53 (p53) and MDM2 get…

Q: Even when not considering the different molecular signaling mechanisms, how can the three main body…

A: Pluripotent cells are formed during embryonic divisions, which occur shortly after fertilization.…

Q: You are researching the regulation of cell-size control and discover that a signaling pathway that…

A: With the given information it is clear that the cell growth receptor is in cell surface and…

Q: Contrast the function & mechanism of formation of Coat Protein (COPI or II)‐ and Clathrin-coated…

A: Protein secretion is a fundamental and developmentally preserved measure in every eukaryotic cell,…

Q: What evidence do the authors provide to suggest that the interaction between Izumo1 and Juno is an…

A: Juno–Izumo binding is required for fertilisation and may have a role in polyspermy membrane…

Q: Which two coat proteins are involved in the bidirectional (two-way) trafficking of the KDEL…

A: Answer : Option B is correct

Q: Which of the following is NOT true about the specification of the eye field? (Check all that apply)…

A: The frontal eye field (FEF) is occasionally included in the premotor area. The frontal eye field…

Q: ou are researching the regulation of cell-size control and discover that a signaling pathway that…

A: Protein kinase A (PKA) is the enzyme responsible for associating a phosphate group to the molecules…

Q: What best describes Cdk1? O Is the serine protein kinase that when activated in a complex with…

A: Introduction:-  Cyclin dependent kynase are the families of protei They are involved in regulating…

Q: Which is true and which is false in the following statements: (regarding cytokinesis in animal…

A: Cytokinesis occurs during a cell division in which cytoplasm is divided.

Q: While studying the secretory pathway, you make the following observation about proteins destined for…

A: 2-Dimensional polyacrylamide gel electrophoresis (2D-PAGE) is a technique through which proteins can…

Q: What import process is involved with the following proteins? I. Fully translated and unfolded…

A: Protein sorting or protein targeting is the biological mechanism in which proteins are transported…

Q: What event is common to ALL signal transduction pathways?     A)  Calcium ions bind to/ activate…

A: Introduction :- Signal transduction is relaying or down-streaming of signals , received through…

Q: The oscillatory clock that drives somite forma-tion in vertebrates involves three essential…

A: Delta from the adjacent cell binds to the notch receptor in Delta-Notch signaling. The notched tail…

Q: - Below are two cell signalling pathways that work together to regulate cell growth, proliferation…

A: According to question The hydrolysis of GTP to GDP is a reversible reaction. The Gibbs energy given…

Q: Binding of talin induces a separation of α and β subunits and induces conformational changes that…

A: Signaling is the mechanism in which the signals in the body regarding any kind of activity is…

Q: Which of the following is true when considering the calcineuron-NFAT pathway? Choose all that are…

A: All the options are correct.

Q: Explain the mechanism action of denaturation of protein from egg (Albumin) using NaHCO3.

A: Denaturation: Many of the weak connections, or bonds (e.g., hydrogen bonds), inside a protein…

Q: What best describes TOR (target of Rapamycin)- O Is a the serine protein kinase that when activated…

A: A cell's growth and its division are a tightly regulated processes controlled by a cascade of…

Q: . Differentiation of the Spemann’s primary organizer requires which of the following?* a.…

A: Spemann’s primary organizer are the transplanted tissue of early gastrulas and its dorsal lip used…

Q: In the above signalling diagram, hormone H binds to both an intracellular and a cell surface…

A: The transmembrane domain is not found in intracellular hormone proteins.

Q: Which of the following signal transduction pathways is most commonly associated with the…

A: Introduction:- signal transduction pathways are a way to relay the external stimuli toward the…

Q: Sea urchin development. Basic features of the formation of the axes: A-P & L-R and the role of…

A: EMT/Ingression - Epithelial mesenchymal transition is a crucial process for placing the mesoderm…

Q: How does the hormone get from its secretory gland to its target tissue? • Are steroid hormones…

A: Since there are multiple questions in the image, I will explain the entire signaling cascade.…