In osmosis, semi permeable membrane allows *1 pointOnly cationsBoth anions and cationsNeither cations nor anionsOnly Anions

Which of the following statements is characteristic of osmosis?Solvent molecules are flowing towards the lower concentration of the solute.Its intensity depends on the concentration difference of the solute.It happens when a cell is placed into a hypertonic solution and expands as a result.The semipermeable membrane does not allow the flow of solvent molecules.None of the other answer possibilities is correct.

31. Which of the following mechanisms best describes the semi-permeability of cell membrane?*1 pointA. The phospholipid bilayer restricts the movement of solid molecules and only allows water to pass through.B. The cell membrane allows water-insoluble molecules to pass freely but severely restricts the passage of water-soluble molecules.C. The cell membrane allows water-soluble molecules to pass but restricts the flow of lipids.D. Smaller hydrophobic molecules require assistance to pass through the cell membrane.32. Which of the following functions correctly describes the composition of a cell membrane in relation to its function?1 pointA. Glycoproteins help to give the cell support and shape.B. Cholesterol helps cells communicate with their external environment through hormones, neurotransmitters, and other signaling molecules.C. Transport proteins help in cell-to-cell communications and molecule transport across the membrane.D. Glycolipids help the cell to recognize other cells of the body.33. Osmosis is the passage of water from a region of high water concentration through a semipermeable membrane to a region of low water concentration. Which of the following physiological events is observed in the human body showing the process of osmosis?*1 pointA. Blood cells bursting in an isotonic solutionB. Blood cells swelling in a hypertonic solutionC. Blood cell shrinking in a hypotonic solutionD. Blood cells bloating up in a hypotonic solution34. Membrane proteins involved in active transport are often called "pumps." What inference can you make based on the statement?1 pointA. They use energy to move a substance along its concentration gradient.B. They use energy to move a substance against its concentration gradient.C. They use energy to bind a substance to the carrier for transport.D. They use energy to dislodge a substance from the carrier after transport.35. If a cell lacks glucose to be utilized in energy production, which of the following membrane proteins would most likely be a problem? *1 pointA. carrierB. channelC. receptorD. cell-recognition36. Which of the following active transport processes occurs when a virus or a bacteria is engulfed and eliminated by white blood cells?*1 pointA. ExocytosisB. EndocytosisC. Vesicle TransportD. None of the above37. How would you classify a biomolecule found to be a non-polar molecule with three long fatty acid chains esterified to glycerol?*1 pointA. It is a steroid protein.B. It is a cholesterol lipid.C. It is an unsaturated fatty acid.D. It is a triglyceride.38. During an immune response to infection, B lymphocytes produce specific antibodies that can bind to and neutralize pathogens. Which of the following biological molecule is the main component of an antibody and allows it to recognize and target specific antigens?*1 pointA. Nucleic acid – stores genetic information for antibody productionB. Carbohydrate – binds to protein to recognize pathogenic cellsC. Protein – detects harmful substances and binds to specific antigensD. Enzyme – produced by a living organism which acts as a catalyst and breaks down molecules39. Which of the following statements correctly describes the relationship between the structure and function among the classifications of carbohydrates?*1 pointA. Monosaccharides: the simplest form of carbohydrates; structural material for the cellB. Disaccharides: formed from two monosaccharides linked by glycosidic bonds; energy sourceC. Polysaccharides: long chain of complex sugars; storage form of carbohydratesD. Polysaccharides: long chain of disaccharides; structural material for the cell40. Which of the following statements will most likely happen if the biomolecule protein is missing in the maintenance and metabolic processes of living organisms?*1 pointA. There will be no myosin and no contraction of muscles that will help metabolic processes.B. There will be reduced hormones and proper communication between cells, tissues, and organs.C. Regulation of food intake and glucose and lipid metabolism occur.D. Structural support, growth, and repair will still happen.

For each statement, indicate whether it is true or false Osmosis is the active transport of water across a selectively permeable membrane.    Aquaporins increase membrane permeability to water in some cell types, such as kidney cells.   During osmosis, water moves from a solution with proportionately more water across a selectively permeable membrane into a solution with proportionately less water.   Osmotic pressure is the force that assists water in moving by osmosis across a selectively permeable membrane.   The greater the concentration of a solution (the less water it has), the greater the tendency for water to move into the solution, and the greater the osmotic pressure to prevent that movement.

Membranes of organelles and cells only allow specific ions, atoms, and molecules to pass because membranes areMultiple choice question.water soluble.impermeable.unevenly calcified.selectively permeable.

Osmosis can be defined as ________.the diffusion of water across a selectively permeable membraneactive transport across a selectively permeable membranethe diffusion of any small molecule across a selectively permeable membranethe diffusion of a solute across a selectively permeable membrane