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1)
Proteins are more the most functionally diverse macromolecules , other than enzymes ,what are two functions of protein ?give general examples of each protein.

2)
What are the what is the difference between passive transport and active transport? give at least one example of each.

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Elin Hessel
Elin HesselLv2
28 Sep 2019

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Related questions

1. What biochemical feature of a phospholipid molecule allows phospholipids to spontaneously form closed compartments when placed in an aqueous solution?

a) they are amphipathic

b) they are charged

c) they are spherical

d) they have a single fatty acid tail

2. Other than phospholipids, what molecule do cells use to alter the fluidity of biological membranes?

3. What distinguishes active transport from passive transport?

a) active transport can utilize channel proteins

b) passive transport does not utilize carrier/transporter proteins

c) active transport requires the input of energy

d) active transport only occurs at the plasma membrane

4. In the case of active transport, the Na+/K+ pump undergoes a sequence of conformational changes that allows the movement of Na+ and K+ across a membrane against their electrochemical gradients, while in the case of ER protein import SRP undergoes a sequence of conformational changes to allow the signal sequence to interact with the translocation pore. What drives these conformational changes?

a) hydrolysis of a high energy phosphate bond

b) binding of a solute or protein

c) both

d) neither

5. Is protein import into the ER co-transcriptional, or co-translational?

Answer the two questions

1. What is a concentration gradient? How does the movement of molecules in relation to their concentration gradient vary between passive transport and active transport?

2. Cells often need to move bulky materials (e.g. macromolecules like proteins or polysaccharides) into and out of the cell.

a. What process enables cells to get rid of large molecules? How does it work?

b. What process enables cells to bring in large molecules? Describe the three specific ways in which particles can be brought into a cell.

1. Cardiovascular, Digestive, Respiratory and Excretory systems are all integrated in their functions in order to maintain homeostasis. What is the common component that must be considered in the function of the digestive, respiratory and excretory systems ?

2. In the body's systems above, there is usually a transport component and a component where the main purpose of the organ system takes place. For example, blood has to be transported via veins and arteries, but exchange takes place in the capillaries. Name as many other examples as you can think of within these systems.

3. How does each system work? What are the general mechanisms (for example, enzymatic action, mechanical action, diffusion, active/passive transport, osmosis, receptor-mediated actions, etc.)?

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