Umar Draz, Author at DocMCQs

The cell membrane is also known as the plasma membrane. It is the outermost covering of:

A. Animal cells

B. Bacterial cells

C. Plant cells

D. None of these

Correct answer is: A. Animal cells

Why? The plasma membrane forms the outer boundary of animal cells, separating internal contents from the external environment. In plants, the cell wall is outermost, so the plasma membrane is not the outer covering.

The speed of electromagnetic waves in a vacuum is:

A. Same for all intensities

B. Faster for higher intensities

C. Lower for higher intensities

D. Dependent on frequency

Correct answer is: A. Same for all intensities

Why? In a vacuum, electromagnetic waves always travel at the speed of light (≈ 3×10⁸ m/s), regardless of their frequency or intensity.

When a key is pressed on the keyboard, which standard is used for converting the keystrokes into the corresponding bits?

A. ANSI

B. ASCII

C. EBCDIC

D. ISO

Correct answer is: A. ANSI

ANSI

What does COUNTA() function do in Excel?

A. Counts cells having alphabets

B. Counts empty cells

C. Counts cells having numbers

D. Counts non-empty cells

Correct answer is: D. Counts non-empty cells

Why? The COUNTA() function counts all non-empty cells, including those with numbers, text, logical values, or formulas. It does not count only numeric cells (that is COUNT()).

In Excel, what does A20:A31 refer to?

A. A single cell

B. A range of cells from A20 to A31

C. A formula to calculate average

D. A specific column labeled A20 and A31

Correct answer is: B. A range of cells from A20 to A31

Why? A20:A31 refers to a continuous range of cells starting from cell A20 down to A31 in column A.

A pixel is:

A. The smallest resolvable part of a picture

B. A picture stored in secondary memory

C. A computer program that draws picture

D. A virus

Correct answer is: A. The smallest resolvable part of a picture

Why? A pixel is the smallest individual element of a digital image or display. Each pixel carries color and brightness information to form a complete picture.

An article is sold for 596 after a 20% discount. What was the original price?

A. 600

B. 745

C. 800

D. 945

Correct answer is: B. 745

Why? Let the original price be x. After 20% discount, selling price = 80% of x. So, 0.8x = 596 → x = 596 ÷ 0.8 = 745.

The synonym of “Prolong” is:

A. Extend

B. Shorten

C. Cancel

D. End

Correct answer is: A. Extend

Why? “Prolong” means to lengthen or extend the duration of something, so the closest synonym is “Extend.”

Choose the correct one: Laugh up one’s sleeves.

A. Laugh in one’s sleeves

B. Laugh at one’s sleeves

C. Laugh on one’s sleeves

D. None of these

Correct answer is: A. Laugh in one’s sleeves

Why? The correct idiom is “laugh in one’s sleeve,” meaning to hide one’s amusement secretly.

What does the idiom “get your goat” mean?

A. To make someone laugh

B. To annoy or irritate someone

C. To make someone happy

D. To confuse someone

Correct answer is: B. To annoy or irritate someone

Why? “Get your goat” means to annoy or irritate a person, often by persistent or petty actions.

Author name: Umar Draz