NEET Cell The Unit of Life — Set 1

Question 1

Which of the following statements about the plasma membrane is correct?

Accepted Answer

The plasma membrane is selectively permeable, allowing the regulated entry and exit of substances.

Question 2

Who first observed and described live microorganisms using a microscope?

Accepted Answer

Anton Von Leeuwenhoek first observed and described live microorganisms, such as bacteria and protozoa, using a simple microscope in the 1670s (NCERT, Chapter 8, page 125). Robert Brown discovered the nucleus, Schleiden contributed to cell theory, and Virchow proposed that cells arise from pre-existing cells.

Question 3

Which cellular component is continuous with the outer membrane of the nuclear envelope?

Accepted Answer

The rough endoplasmic reticulum (RER) is continuous with the outer membrane of the nuclear envelope and is involved in protein synthesis.

NEET Biology: Cell The Unit of Life — Practice Set 1

Q1. Which of the following statements about the plasma membrane is correct?

Q2. Who first observed and described live microorganisms using a microscope?

Q3. Which cellular component is continuous with the outer membrane of the nuclear envelope?

Q4. Which of the following statements about the nucleus is correct?

Q5. What is the primary component of the middle lamella in plant cells?

Q6. Which organelle is commonly referred to as the ‘protein factory’ of the cell?

Q7. Which of the following is correct about the Golgi apparatus?

Q8. Which of the following statements about cell theory is incorrect?

Q9. Which of the following statements about chromosomes is correct?

Q10. Which of the following statements about the nucleolus is incorrect?