Question : Which of the following statements is correct regarding cell membranes? I. The membrane is selectively permeable to some molecules present on either side of it. II. Water may also move across this membrane from lower to higher concentration.
Option 1: Only II
Option 2: Only I
Option 3: Neither I nor II
Option 4: Both I and II
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Correct Answer: Only I
Solution : The correct answer is Only I.
The selective permeability of cell membranes is a key property. Cell membranes are made up of a lipid bilayer with proteins embedded in them. This structure enables them to regulate the flow of chemicals and ions into and out of the cell. Water normally travels across a cell membrane by osmosis, which includes water moving from areas of greater concentration to areas of lower concentration rather than from lower to higher concentration.
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Question : Directions: Consider the statements to be true and decide which of the given conclusions/assumptions can be drawn from the given statements. Statements: When water is cooled, it turns into ice. When water is heated, it turns into steam. Conclusions: I. Water is a solid. II. Water is a gas.
Option 1: Only conclusion I follows
Option 2: Only conclusion II follows
Option 3: Both conclusions I and II follow
Option 4: Neither conclusion I nor II follows
Question : Directions: Consider the statements to be true and decide which of the given conclusions/assumptions can be drawn from the given statements. Statements : All states having dams face no water problem. One of the states has no dam. Conclusions : I. It may be facing a water problem. II. Dams solve the water problem.
Option 3: Both conclusion I and conclusion II follow
Option 4: Neither conclusion I nor conclusion II follows
Question : Which of the following pair of compound - melting point is correct? l. Acetic acid - 290 K II. Ethanol - 156 K
Option 1: Only 1
Option 2: Both I and II
Option 4: Only II
Question : Directions: Three statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All c is f. No f is t. All p is c. Conclusions: I. Some t is c. II. No p is t.
Option 1: Only conclusion II follows
Option 2: Only conclusion I follows
Option 3: Neither conclusion I nor II follows
Option 4: Either conclusion I or II follows
Question : Which of the following statements is correct?
I. The nutrition requirements of adolescents are higher than adults.
II. Adolescents are generally grouped in the age group of 10 to 19 years.
Option 4: Only I
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