11. Which of the following correctly describes a buffer? A buffer converts an al
ID: 45547 • Letter: 1
Question
11. Which of the following correctly describes a buffer?
A buffer converts an alkaline solution to neutral
A buffer converts an acid solution to neutral.
A buffer converts alkaline solutions to acid solutions.
A buffer converts strong bases or acids to weak bases or acids.
12. Which term does not belong in this list?
Acid
Vinegar
Hydrogen ion donor
pH 8
Lactic acid
13. The process in which molecules spread randomly from areas of higher concentration to areas of lower concentration is:
Filtration
Diffusion
Exocytosis
Osmosis
14. Organize the following solutions from most concentrated to least concentrated: hypertonic, hypotonic, and isotonic.
Hypotonic>Hypertonic>Isotonic
Hypertonic>Hypotonic>Isotonic
Hypertonic>Isotonic>Hypotonic
Isotonic>Hypotonic>Hypertonic
15. The rate of diffusion depends on which of the following?
The medium
The size of the molecule
The polarity
All of the above
A. and C. only
16. All of the following are examples of elements except
Oxygen
Water
Hydrogen
Carbon
17. What would happen to a eukaryotic cell, if too much osmotic pressure develops within a cell?
The cell would remain the same size, but the internal organelles would become dehydrated
The cell would decrease in size, and could collapse.
The cell would increase in size, and could lyse.
Nothing, osmotic pressure does not impact the cell.
18. In the following chemical reaction, what is carbon dioxide (CO2)?
12 H20 + 6 CO2 = 1 glucose molecule + 6 O2
A. substrate
B. product
C. enzyme
D. activation factor
E. independent variable
19. The bond in which two atoms share one or more pairs of electrons is a_________ bond.
Polar
Hydrogen
Ionic
Covalent
20. Which of the following terms includes all of the chemical reactions that occur within a cell?
Cellular respiration
Catabolism
Redox reactions
Metabolism
Phosphorylation
Explanation / Answer
11. 4th option because base always lessen or moderate the effect
12.3rd option because ph 8 denotes alkaline nature
13. 2nd option :- this is the definition of diffusion only
14. 3rd option
15. 3rd option
16. 2nd , water is a compound
17. 1 st option
18. substrate
19. covalent
20. metabolism
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