Class 8 Practice – Level 2 – Set 1 – Cell Structure and Functions

Total questions: 25

What type of microscope did Anton van Leeuwenhoek use to observe living microorganisms?

Electron microscope

Light microscope

Scanning tunneling microscope

Compound microscope

None

Which of the following structures did Robert Brown discover within the cell?

Cell membrane

Nucleus

Chloroplast

Ribosome

None

Which scientist first observed living microorganisms in water and described them as "animalcules"?

Robert Hooke

Anton van Leeuwenhoek

Rudolf Virchow

Louis Pasteur

None

The cell theory, which states that all living things are composed of cells, was developed by which scientists?

Schleiden and Schwann

Hooke and Brown

Watson and Crick

Pasteur and Koch

None

In which of the following contexts did Robert Hooke make his observations?

Using a high-powered electron microscope

Observing sections of cork

Studying the structure of animal tissues

Investigating the behavior of bacteria

None

What is the primary role of the cytoplasm in a eukaryotic cell?

To house genetic material

To facilitate chemical reactions and provide shape

To produce energy

To protect the cell from external damage

None

Which of the following cytoplasmic components is primarily involved in the synthesis and transport of proteins?

Lysosomes

Ribosomes

Mitochondria

Peroxisomes

None

In plant cells, what structure can be found within the cytoplasm that aids in photosynthesis?

Golgi apparatus

Chloroplasts

Mitochondria

Ribosomes

None

What distinguishes the cytoplasm from the cytosol?

Cytoplasm includes organelles, while cytosol is the liquid part only.

Cytoplasm is only found in plant cells.

Cytoplasm is thicker than cytosol.

Cytoplasm is found in the nucleus.

None

10.

Which organelle in the cytoplasm is responsible for degrading and recycling cellular waste?

Golgi apparatus

Lysosomes

Endoplasmic reticulum

Ribosomes

None

11.

The cytoskeleton in the cytoplasm is primarily composed of which of the following?

Lipids

Nucleic acids

Proteins

Carbohydrates

None

12.

What is the function of the endoplasmic reticulum (ER) in the cytoplasm?

Energy production

Storage of genetic material

Synthesis and transport of proteins and lipids

Photosynthesis

None

13.

What happens to the cytoplasm during cell division?

It remains unchanged.

It divides evenly between daughter cells.

It thickens and solidifies.

It transforms into the nucleus.

None

14.

In what way do mitochondria contribute to the cytoplasm's function?

By synthesizing proteins

By generating ATP through cellular respiration

By producing glucose

By degrading waste materials

None

15.

Which cellular process primarily occurs in the cytoplasm, contributing to the maintenance of cellular homeostasis?

DNA replication

Protein synthesis

Mitosis

Photosynthesis

None

16.

What is the primary purpose of mitosis?

To produce gametes

To enable growth and repair of tissues

To facilitate photosynthesis

To generate genetic diversity

None

17.

Which phase of mitosis is characterized by the alignment of chromosomes along the equatorial plane of the cell?

Prophase

Metaphase

Anaphase

Telophase

None

18.

During which phase do the spindle fibers shorten, pulling sister chromatids apart?

Prophase

Metaphase

Anaphase

Telophase

None

19.

Which of the following statements about mitosis is true?

Mitosis results in four genetically identical cells.

Mitosis occurs only in prokaryotic cells.

Mitosis results in two genetically identical cells.

Mitosis is the same as meiosis.

None

20.

What structure forms during prophase to facilitate the separation of chromosomes?

Nucleus

Cell membrane

Spindle apparatus

Golgi apparatus

None

21.

What is the primary function of ribosomes in a cell?

Lipid synthesis

Protein synthesis

DNA replication

Energy production

None

22.

Ribosomes can be found in which of the following locations within a cell?

Attached to the endoplasmic reticulum and free in the cytoplasm

Only within the nucleus

Exclusively in the mitochondria

Only embedded in the cell membrane

None

23.

What are the two subunits that make up a ribosome?

Large and small subunits

Alpha and beta subunits

Light and heavy subunits

Outer and inner subunits

None

24.

Which type of RNA is directly involved in the process of translation at the ribosome?

Messenger RNA (mRNA)

Transfer RNA (tRNA)

Ribosomal RNA (rRNA)

All of the above

None

25.

What is a key difference between ribosomes in prokaryotic and eukaryotic cells?

Prokaryotic ribosomes are larger than eukaryotic ribosomes.

Eukaryotic ribosomes are made only of RNA.

Prokaryotic ribosomes are smaller and differ in structure from eukaryotic ribosomes.

Eukaryotic ribosomes are found only in the nucleus.

None

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Class 8 Practice – Level 2 – Set 1 – Cell Structure and Functions

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