Of the following functions the peripheral glycoproteins and glycolipids (surface markers) of animal cell membranes are most important for a) the ability of the cell to recognize like and different cells. b) active transport of molecules against their concentration gradients. c) facilitated diffusion of molecules down their concentration gradients. d)maintaining membrane fluidity at low temperatures.

Consider the amino acids on the image below. Which of the following amino acids would be most likely to be found in the part of an integral membrane protein that is located within the membrane? (Select all answers that apply.) Asparagine (Asn)   Lysine (Lys)   Phenylalanine (Phe)   Valine (Val)   Glutamic acid (Glu)  Methionine (Met)

What integral membrane protein family made of two membrane-spanning chains (α and β) is involved in attaching cells to their extracellular microenvironment? a)     lamininsb)     fibronectinsc)     integrinsd)     myosinse)     lysins

Imagine you are working in a lab and you examine an unknown cell only to discover it possesses gap junctions and microvilli. Based on those findings, what can you assume regarding its function(s)? O a) it specializes in intercellular communication O b) it can withstand mechanical stress c) it likely functions in absorption O d) A and C O e) B and C

Joins an actin bundle in one cell to a similar bundle in a neighboring cell a)Desmosomes b)Tight Junctions c)Hemidesmosomes d)Adheren Junctions e)Gap Junctions

For which of the following apply: the extracellular space is eliminated here near the surface between two cells. A) Zonula adherens B)Zonula  occluded C) Desmosome D) Gap junction E) Hemidesmosome

Filaments connected to the dense plaque underlying the membrane in a desmosome course outward into the cytoplasm. These filaments are composed of the protein _____ and are otherwise known as ______. a)     actin, microfilamentsb)     keratin, microfilamentsc)     actin, intermediate filamentsd)     keratin, intermediate filamentse)     tubulin, intermediate filaments

A cell contains 97% water and it is placed in a 5% salt solution. a) Which contains a higher concentration of water?      i) cytoplasm of the cell ii) salt solution  b)  Which contains a higher concentration of solutes?    i) cytoplasm of the cell ii) salt solution  c) Cell membranes are selectively permeable, so which of the substances will move across it? i) water ii) salt iii) both water and salt iv) none   d) What will happen to the volume of the cell? i) increase ii) decrease iii) stay the same i need help on this hw question. i tried it on my own but im not too sure if it's correct. the following are what i think the answers are:  a) cytoplasm of the cell  b) salt solution  c) water  d) decrease  it would be helpful if you can confirm my answers and explain what i did wrong, thank you!

5- The function of carbohydrates in the cell membrane is primarily: a) Providing structural integrity b) Assisting in the diffusion of water-soluble substances c) Serving as receptor sites for hormones d) Forming glycoproteins 6- Which of the following cellular structures is responsible for producing energy? a) Nucleus b) Golgi apparatus c) Mitochondria d) Endoplasmic reticulum 7- The region within the cell that surrounds the nucleus is called: a) Cell membrane b) Cytoplasm c) Golgi apparatus d) Endoplasmic reticulum. 8- Which of the following cellular structures is responsible for storing genetic information? a) Nucleus b) Ribosome c) Lysosome d) Vacuole 9- The organelle that is responsible for protein synthesis in a cell is: a) Nucleus b) Mitochondrial c) Ribosome d) Golgi apparatus

Q48