lycolipids in the plasma membrane are located at: 1.Inner leaflet of the plasma membrane 2.The outer leaflet of the plasma membrane 3.Evenly distributed in the inner and outer leaflets 4.It varies according to cell types

What is the significance of the protein-lined pits? O Protein attracts other proteins needed for ATP synthesis within the cell. Protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. The polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. Receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Choose the best answer 1) If the lipid bilayer in Section B represents the plasma membrane, which part of the protein is the cytoplasmic domain? There is no way to tell which is the cytoplasmic domain with the information given. Section A is the cytoplasmic domain since it contains disulfide bonds. Section C is the cytoplasmic domain since the N-terminus is always found in the cytoplasm. Section C is the cytoplasmic domain since glycosylation cannot occur on the cytoplasmic domain. Section B is the cytoplasmic domain since it is an alpha-helix.  2) Which type of amino acids is most commonly found in Section B? Hydrophilic Hydrophobic There is no way of knowing which type of amino acids is most commonly found in Section B with the given information Charged 3) If the lipid bilayer in Section B represents the ER membrane, which part of the protein is found INSIDE the ER (in the ER lumen)? The entire protein must be inside the lumen of the ER. Section C is inside the ER…

The following table depicts the rate of transport of a molecule into a cell as the external concentrations are changed. Based on what you know about the characteristics of membrane transport, the molecule is most likely transported by: a) passive transport b) simple diffusion across the membrane c) facilitated diffusion d) active transport

Which of the following best describes a hypotonic solution? a-There is a higher concentration of solute outside the cell than inside the cell b-There is a lower concentration of solute outside the cell than inside the cell c-The solute concentration both inside and outside the cell is equal d-Through osmosis, water will enter the cell causing it to swell

A hypothetical molecule X+ is important for cell function and is present outside of a cell. List the factors that that will perdominantly influence the ability of molecule X to cross the membrane and enter the cell.

18) The contents of ..once released inside the cell can kill the cell. They can also be used to break down the bacteria or the food, which has been taken up by the cell, as well as degrade cell organelles (such as mitochondria), which are too old.

What is the role of lysozyme and a low ionic strength extraction buffer? Select all that apply. Cells absorb water from a low ionic strength extraction buffer, by osmosis, swell and lyse, releasing their contents Lysozyme breaks down bonds in the cellulose cell wall of plants, weakening the structure Cells release water into a low ionic strength extraction buffer by osmosis, shrink and lyse, releasing their contents Lysozyme is an enzyme found in lysosomes in cells Lysozyme breaks down bonds in the peptidoglycan cell wall of bacteria, weakening the structure Lysozyme is an antibiotic found in tears, saliva, human milk and mucus.

As part of their function, membrane-bound organelles, such as mitochondria and the en- doplasmic reticulum, must move substances across their membranes. Which of the following statements best describes a feature shared by mitochondria and the endoplasmic reticulum that increases the efficiency of their functions? A B с D double membranes, in which one membrane encloses the other rigid and nonfluid membranes membranes composed of carbohydrates highly folded membranes

The image below depicts 3 membrane carrier proteins. Describe the different types of membrane carrier proteins (1, 2 and 3) in terms of their direction of transportation. A 1. A B 2 A 3 B