How are cells formed?

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Cells are formed from pre exixting cells by the process of cell division which could be amitosis,mitosis or meiosis.

Organelles are ____.

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Organelles are membrane bound discrete structures inside the cell which have a definite function.

Which structures are present in both plant and animal cells?

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Cell membrane and ribosomes are organelles which are present in both plant and animal cells.Cell wall is present only in plant cells.

Which is the major region of of the cellular activity in the both plant and animal cells?

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Cytoplasm is the region of cellular activity in both plant and animal cells.

Ribosomes are found in

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Ribosomes are found in cytoplasm and also in semi autonomous organelles like mitochondria and chloroplast which have their own DNA.

Which of the following statements support the cell theory?

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Cells can be cultured by tissue culture supports the statement that cells arise from pre-existing cells

Organelles of a cell are generally membrane bound structures. Which of these are an exception?

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Ribosomes and centrioles are non membrane bound organelles.

Which of the following is an exception to cell theory?

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Viruses are subcellular structures and they are exceptions to the cell theory.They are considered to be borderline organisms between the living and the non living

Which is true for both prokaryatic and eukaryotic cells?

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Ribosomes are universal organelles which are found in both prokaryotic and eukaryotic cells.Cell walls are not found in eukaryotic animal cells. Membrane bound organelles and definite nucleus is not present in prokaryotic cells.

Plant cells lack

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Centrioles are absent in plant cells. Spindle fibers and endoplasmic reticulum are found in plant cells.

The fluid mosaic model describes the cell membrane as ____.

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According to the fluid mosaic model the plasma/cell membrane is composed of a lipid bilayer with embedded/intrinsic proteins and outer/extrinsic proteins.

The fluidity of the plasma membrane is because of the presence of ____.

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The fluidity of the cell membrane is due to the presence of the phosholipid bilayer.

Extrinsic proteins are ____.

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Extrinsic/external proteins superficially attached and can be separated easily

Which is not true for the lipids?

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They are mainly composed of phoshoglycerides or phospholipids

The main function of the Golgi apparatus is____.

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The main function of the Golgi apparatus is to package the materials like proteins prepared by the ER.

Lysosomes sre synthesised by____.

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Lysosomes are vesicular structures which are formed by the process of packaging in the Golgi apparatus.

Protein containing vesicles formed by the RER fuse with the

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Protein containing vesicles formed by the RER fuse with the Cis face of the Golgi apparatus. The modified proteins are released from the Trans face of the Golgi apparatus.

Golgi apparatus helps in the formation of___.

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Golgi apparatus helps in the laying down of the cell plate during cell division.

The enzymes present in the Lysosomes function at___.

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Hydrolytic enzymes present in the lysosomes act at acidic pH.

Endoplasmic reticulum will be absent in which of these mammalian cells?

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RBC does not have many organelles including ER.The rest of the cells mentioned are involved in synthesis of proteins and lipids and hence will have large amount of ER.

Synthesis of Pepsinogen and Steroids will respectively take place in___.

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Pepsinogen being a protein will be synthesised in the RER while steroids which contain lipids will be synthesised by the SER.

Bone digesters or osteoclats are rich in

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Osteoclats are rich in lysosomes which contain hydrolytic enzymes capable of digesting carbohydrates, proteins, lipids and nucleic acids.

Concenteration of the ions in the vacuoles of the plant cells will be___.

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In plants , the tonoplast of the vacuole facilitates the transport of a number of ions against the concentration gradients into the vacuole, hence their concentration is higher in the vacuole than in the cytoplasm

Besides the nucleus, DNA is also present in ____.

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Besides the nucleus, DNA is also present in the matrix of the mitochondria and the stroma of the chloroplast.

Carbohydrates, fats and proteins are stored respectively in ____.

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Carbohydrates, fats and proteins are stored respectively in Amyloplast, Elaioplasts and Aleuroplasts. All of them are types of Leucoplasts.

Ribosomes in eukaryotic cells is made of

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Ribosomes in eukaryotic cells is made of RNA and Proteins.

Which is true regarding Microbodies?

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They are present both in plant and animal cells. They are not present in prokaryotic cells.

The ribosomes associated with the chloroplast and the mitochondria are respectively

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The riboosmes associated with both these organelles is of 70s type.

Mitochondria divide by the process of ____.

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Mitochondria divide by the process of fission.

The site for ribosome synthesis is ____.

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The nucleolus is the site for active ribosomal RNA synthesis.

ICSE Class 9th Biology - The cell MCQs
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ICSE Class 9th Biology - The cell MCQs