Question 15 (4 points) You are given the following scenario- The outsi.docx
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Question 15 (4 points) You are given the following scenario: The outside of a cell contains 150 mM sodium ( Na + ) and 50 mM chloride ( Cl ) , while the inside of the cell contains 50 mM sodium and 70 mM chloride. A transmembrane protein in this cell's plasma membrane is able to transport 1 sodium ion outside the cell at the same time it moves 2 chloride ions into the cell. Which of the following accurately describe this situation? (More than one option may be possible.) The energy of sodium moving with its gradient is used to move chloride against its gradient. The energy of chloride moving with its gradient is used to move sodium against its gradient. The transmembrane protein is a symporter. The transmembrane protein is a pump involved in primary active transport. The transmembrane protein is a transporter involved in secondary active transport. The transmembrane protein is an antiporter. Given the following illustration of a cell's solute concentration (solute = red dots): Outside the cell which of the following descriptions is TRUE? If the membrane is permeable to the solute, the solute will move into the cell because the solution is hypertonic to the inside of the cell. If the membrane is not permeable to the solute, water will move into the cell because the solution is hypertonic to the inside of the cell. If the membrane is not permeable to the solute, water will move outside the cell because the inside of the cell is hypertonic to the solution. If the membrane is permeable to the solute, the solute will move outside the cell because the solution is hypotonic to the inside of the cell. If the membrane is not permeable to the solute, water will move into the cell because the solution is hypotonic to the inside of the cell. .
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Explain how substances get across membranes and into the cell.Sol.pdf
Explain how substances get across membranes and into the cell.
Solution
The plasma membrane surrounding animal cells is where the exchange of substances inside and
outside of cells takes place. Some substances need to move from the extracellular fluid outside
cells to the inside of the cell, and some substances need to move from the inside of the cell to the
extracellular fluid. the plasma membrane is choosy about what substances can pass through it, it
is said to be selectively permeable. Selectively permeable or semipermeable means that only
certain substances are able to pass through the membrane. Transporting substances across the
plasma membrane can require that the cell use some of its energy. If energy is used, the transport
is called active. If molecules can pass through the plasma membrane without using energy, the
molecules are using passive transport.
ACTIVE TRANSPORT
Sometimes, the molecules are just too big to easily flow across the plasma membranes or
dissolve in the water so that they can be filtered through the membrane. In these cases, the cells
must put out a little energy to help get molecules in or out of the cell.
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osmosis, the concentration of substances in the water is taken into consideration. If a solution is
isotonic, that means the concentrations of the substances (solutes) and water (solvent) on both
sides of the membrane are equal. If one solution is hypotonic, there is a lower concentration of
substances (and more water) in it when compared to another solution. If a solution is hypertonic,
there is a higher concentration of substances in it (and less water) when compared to another
solution. For example, the blood in your body contains a certain amount of salt. The normal
concentration is isotonic. If suddenly there is too high a concentration of salt, the blood becomes
hypertonic (too many salt molecules). This excess of salt forces water out of the blood cells in an
attempt to even things out. But the effect this action has is actually that of shrinking the blood
cells.
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Solution
The plasma membrane surrounding animal cells is where the exchange of substances inside and
outside of cells takes place. Some substances need to move from the extracellular fluid outside
cells to the inside of the cell, and some substances need to move from the inside of the cell to the
extracellular fluid. the plasma membrane is choosy about what substances can pass through it, it
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certain substances are able to pass through the membrane. Transporting substances across the
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is called active. If molecules can pass through the plasma membrane without using energy, the
molecules are using passive transport.
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Sometimes, the molecules are just too big to easily flow across the plasma membranes or
dissolve in the water so that they can be filtered through the membrane. In these cases, the cells
must put out a little energy to help get molecules in or out of the cell.
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osmosis, the concentration of substances in the water is taken into consideration. If a solution is
isotonic, that means the concentrations of the substances (solutes) and water (solvent) on both
sides of the membrane are equal. If one solution is hypotonic, there is a lower concentration of
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QUESTION 3 (10 MARKS) The Balance of Payments (BOP) can be formally de.docx
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Question 25 State whether each of the following statements concerning.docx
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Question 22 options:
a)
b)
c)
d)
e)
Question 23 (1 point)
The main advantages for a firm in going public are greater liquidity, better access to capital, and greater ability of investors to monitor the management of the firm.
Question 23 options:
Question 24 (1 point)
The firm commitment process is the most common practice for IPOs.
Question 24 options:
.
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Question 2:
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QUESTION 2
President John F Kennedy of the USA remarked nearly 60 years ago that consumers have basic right which they needed to be accorded by firms. However, it a small fraction of consumers globally who know that they have rights they need to be accorded by firms. Explain how services would be offered to consumers when majority of them do not know their rights. [30 MARKS]
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A. Design a state diagram to recognize the floating- point literals of your favorite programming language
B. Write and test the code to implement the state diagram of Problem 2
C. Convert the lexical analyzer (which is written in C) given in Section 4.2 to Java
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