Cell: The Unit of Life' For NEET
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which statement correctly describes the principal function of the Golgi apparatus?

It packages materials for delivery within the cell or secretion outside the cell.
It synthesises proteins directly from amino acids.
It produces ATP during aerobic respiration.
It stores the genetic material of the cell.
1

The Golgi apparatus modifies and packages materials received from the endoplasmic reticulum. These materials are then delivered to intracellular targets or secreted outside the cell.

Which property of the plasma membrane enables it to regulate the movement of substances across the cell boundary?

It is composed entirely of proteins.
It is completely impermeable to polar molecules.
It is selectively permeable.
It contains a rigid layer of cellulose.
3

The plasma membrane is selectively permeable, allowing only certain molecules or ions to move across it. Substances may cross by passive transport, facilitated transport or active transport.

Which combination correctly represents the constituents of chromatin?

DNA, histones, non-histone proteins and RNA
DNA, cellulose, proteins and lipids
RNA, phospholipids and carbohydrates only
DNA and histones only
1

Chromatin contains DNA, basic proteins called histones, non-histone proteins and RNA. During cell division, the chromatin material becomes organised into distinct chromosomes.

Which statement correctly describes nuclear pores?

They are sites of ATP synthesis within the nucleus.
They connect the nucleolus directly with the Golgi apparatus.
They are formed only in prokaryotic cells.
They permit the movement of RNA and proteins between the nucleus and cytoplasm.
4

Nuclear pores are formed where the two membranes of the nuclear envelope fuse. RNA and protein molecules move through these pores in both directions between the nucleus and the cytoplasm.

Which cellular structure is the site of protein synthesis?

Lysosome
Golgi apparatus
Ribosome
Centriole
3

Ribosomes are non-membrane-bound structures composed of RNA and proteins. They serve as the sites of protein synthesis in both prokaryotic and eukaryotic cells.

Which cellular structure is extensive and continuous with the outer membrane of the nucleus?

Rough endoplasmic reticulum
Golgi apparatus
Lysosome
Mitochondrion
1

The rough endoplasmic reticulum is extensive and continuous with the outer membrane of the nucleus. Its outer surface bears ribosomes and it is commonly found in cells involved in protein synthesis and secretion.

What is the main component of the middle lamella in plant cells?

Cellulose
Calcium pectate
Chitin
Peptidoglycan
2

The middle lamella is composed mainly of calcium pectate. It holds or glues neighbouring plant cells together.

Who first saw and described a live cell?

Robert Brown
Matthias Schleiden
Rudolf Virchow
Anton Von Leeuwenhoek
4

Anton Von Leeuwenhoek first saw and described a live cell. Robert Brown later discovered the nucleus, while Schleiden and Virchow contributed to the development of cell theory.

Which statement is inconsistent with the cell theory as understood today?

New cells arise spontaneously from non-living material.
All cells arise from pre-existing cells.
All living organisms are composed of cells and products of cells.
Schleiden and Schwann together formulated the cell theory.
1

The idea that new cells arise spontaneously from non-living material is inconsistent with cell theory. Rudolf Virchow explained that cells divide and new cells arise from pre-existing cells.

Which statement about the nucleolus is incorrect?

It is present within the nucleoplasm.
It is surrounded by a membrane.
It is a site of active ribosomal RNA synthesis.
It may be larger and more numerous in cells actively synthesising proteins.
2

The nucleolus is not surrounded by a membrane. It is a spherical structure within the nucleoplasm and is a site of active ribosomal RNA synthesis.

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