Cell Membrane | Med Intro 🧬

تبو بعدين نزيدكم زيهم ولا حسيتيهم يلخبطو ؟

ياعيله لو موصلتوش في سايتو متحلوش ولو حسيتوا روحكم دختوا متحلوش هدا اسئله نظام cases وتعتمد على الفهم لو تقروا السؤال كويس تلقوه يعطيكم المعلومه ويطلب شن سبب أو شن صاير

هي جاوبوا هادم وتو نزيدكم بعدين 🙂

researcher artificially increases cholesterol content in a plasma membrane and observes a reduction in membrane fluidity under the experimental conditions described in the material. Which statement best matches this observation? 1. Cholesterol can decrease membrane fluidity 2. Cholesterol always causes flip-flop 3. Cholesterol forms hydrophilic pores 4. Cholesterol replaces membrane proteins

A membrane contains specialized microdomains that are thicker and less fluid than the surrounding membrane. Certain integral membrane proteins are concentrated in these regions. Which structure best explains these findings? 1. Glycocalyx 2. Lipid raft 3. Cytosol 4. Nuclear pore

بليز خلس معاش تبعتي 🥲خفت من الاسئله

A membrane transporter moves two different substances simultaneously in the same direction. One substance moves down its electrochemical gradient and provides the energy that drives the other substance against its gradient. Which transporter is described? 1. Uniporter 2. Symporter 3. Antiporter 4. Ion channel

cell needs to move a substance against its electrochemical gradient. The process is coupled directly to an energy source such as ATP and involves a membrane carrier functioning as a pump. Which category best describes the process? 1. Simple diffusion 2. Facilitated diffusion 3. Primary active transport 4. Lateral diffusion

Two membrane proteins transport the same solute. Protein X provides an aqueous pathway through the membrane. Protein Y binds the solute and changes its conformation before releasing it on the other side. Which comparison is correct? 1. X is a carrier; Y is a channel 2. X is a channel; Y is a carrier 3. Both are necessarily channels 4. Both transport only by simple diffusion

membrane protein transports a specific solute. Experimental data show that the protein binds the solute first, then undergoes a conformational change, and finally releases the solute on the opposite side. No continuous pore is observed. Which conclusion is most appropriate? 1. The protein is a channel 2. The protein is a carrier 3. The protein is a lipid raft 4. The protein is a peripheral carbohydrate

A charged molecule cannot cross the hydrophobic core of the plasma membrane. It is nevertheless transported rapidly through a membrane protein that forms a hydrophilic pathway. The pathway can open and close after a change in membrane potential. Which mechanism best explains the observation? 1. Carrier-mediated transport 2. Voltage-gated channel transport 3. Simple diffusion 4. Flip-flop

جاوبوا في التعليقات

membrane protein contains hydrophobic α-helices that cross the entire lipid bilayer. Its hydrophilic regions face the aqueous environments on both sides of the membrane. A mutation prevents the protein from spanning the membrane, but the hydrophobic helices remain embedded in only one leaflet. Which classification has changed most directly? 1.Peripheral membrane protein 2.Monolayer-associated protein 3.Lipid-linked protein 4.Glycocalyx

membrane protein contains hydrophobic α-helices that cross the entire lipid bilayer. Its hydrophilic regions face the aqueous environments on both sides of the membrane. A mutation prevents the protein from spanning the membrane, but the hydrophobic helices remain embedded in only one leaflet. Which classification has changed most directly? 1.Peripheral membrane protein 2.Monolayer-associated protein 3.Lipid-linked protein 4.Glycocalyx

صباح الخير جهزوا كويز في سايتو part 1

صباح الخير 🤍 يُعطيك المكان الذي طلبته فتتسع عليك، وتأخذ خُطوة العُمر و تنجح لتعوّض ما فاتك .. فأبشر ..💗💗