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Cell Biology

Description: GATE LIFE SCIENCES/BIOTECHNOLOGY
Number of Questions: 15
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Tags: cell Biotechnology
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The term ‘lipochondria’ is applicable to which of the following cell organelles?

Cell organelles are the living counterparts of typical eukaryotic cells.

  1. Mitochondria

  2. Vacuoles

  3. Golgi bodies

  4. Centrioles

  5. Ribosomes


Correct Option: C
Explanation:

Golgi bodies are also called lipochondria because temporary storage forms of lipids are found in the Golgi bodies.

The term ‘ergastoplasm’ was originally coined to designate which of the following cell organelles?

Cell organelles are the living counterparts of typical cells.

  1. Ribosome

  2. Mitochondria

  3. Cytoplasm

  4. Lysosome

  5. Endoplasmic reticulum


Correct Option: E
Explanation:

Endoplasmic reticulum was originally known as ergastoplasm. The cytoplasm of the endoplasmic reticulum is interlaced by membranous vesicles, flattened sacs and cisternae.

The famous historic book ‘Micrographia’ is written by

  1. Robertson

  2. Charles Darwin

  3. Robert Brown

  4. Robert Hooke

  5. George Palade


Correct Option: D
Explanation:

The famous book ‘Micrographia’ contains the detailed testimony of Robert Hooke’s observations.

The epithelial tissue tumor is also known as According to the cells of origin, tumors may be classified into various types.

  1. sarcoma

  2. rhabdomyosarcoma

  3. carcinoma

  4. lymphoma

  5. leukemia


Correct Option: C
Explanation:

Carcinoma is an epithelial tissue derived tumor.

Which of the following plant pigments is responsible for the brown hues of certain algae?

  1. Chlorophyll

  2. Luciferin

  3. Carotene

  4. Anthocyanin

  5. Fucoxanthin


Correct Option: E
Explanation:

Fucoxanthin is present in certain marine brown algae and diatoms.

Photosystem II is found in

  1. grana of of chloroplast

  2. stroma of chloroplast

  3. matrix of chloroplast

  4. mitochondrial matrix

  5. cytochrome


Correct Option: A
Explanation:

Grana represent the stack of thylakoids present in chloroplast.

Oxysomes are associated with Mitochondria are double membrane bound cell organelles.

  1. mitochondrial matrix

  2. mitochondrial DNA

  3. outer mitochondrial membrane

  4. inner mitochondrial membrane

  5. intermembrane space


Correct Option: D
Explanation:

Oxysomes are associated with the inner mitochondrial membrane. Oxysomes are also called F1 particles.

Which of the following is the example of a multi-drug transport system providing resistance to many drugs targeted at cancerous cells?

 

  1. Sodium potassium pump

  2. ATP binding cassettes

  3. Proton pump

  4. Co-transport

  5. Facilitated diffusion


Correct Option: B
Explanation:

ATP binding cassettes are multi-drug transport systems that are involved in efflux of various drugs. They are known to confer resistance to various drugs targeted at cancerous cells.

The type of filament associated with nuclear lamina is called The nuclear lamina is composed of nuclear lamins.

  1. actin

  2. myosin

  3. microtubule

  4. intermediate filament

  5. vimentin


Correct Option: D
Explanation:

The nuclear lamina is composed of nuclear lamins that are associated with intermediate filaments having diameter of about 10 nm. Nuclear lamins belong to type V intermediate filament proteins.

How many nuclear pore complexes are present in a typical mammalian cell? The nuclear envelope of a typical eukaryotic cell contains nuclear pore complexes made up of proteins called nucleoporins.

  1. 1000 - 2000

  2. 2000 - 3000

  3. 3000 - 4000

  4. 4000 - 5000

  5. 5000 - 6000


Correct Option: C
Explanation:

The nuclear envelope of a typical mammalian cell contains 3000-4000 nuclear pore complexes.

The thickness of plasma membrane is about The semi-permeable plasma membrane is so thin that it is far below the limit of the light microscope.

  1. 10 - 50 angstrom

  2. 50 - 75 angstrom

  3. 75 - 100 angstrom

  4. 100 - 175 angstrom

  5. 200 - 300 angstrom


Correct Option: C
Explanation:

The plasma membrane is only about 75-100 angstrom thick and cannot be resolved by optical microscope.

Which of the following is a double membranous cell organelle?

Cell organelles are the living counterparts of a typical cell having specialised roles.

  1. Ribosome

  2. Golgi body

  3. Peroxisome

  4. Lysosome

  5. Chloroplast


Correct Option: E
Explanation:

Chloroplast is a double membranous cell organelle.

Spherosomes are known to arise from Spherosomes or oleosomes are triacylglycerol filled vesicles that are important in seed development.

  1. ribosomes

  2. mitochondria

  3. plasma membrane

  4. endoplasmic reticulum

  5. golgi apparatus


Correct Option: D
Explanation:

Spherosomes are specialised triacylglycerol filled vesicles known to arise from endoplasmic reticulum.

Who of the following scientists was awarded Nobel Prize for studies on chlorophyll pigments?

Chlorophyll is the universal green pigment present in the chloroplasts of green plants.

  1. A. Kossel

  2. R. Wilstatter

  3. M. Tswett

  4. Kary Mullis

  5. Park and Pon


Correct Option: B
Explanation:

R. Wilstatter was awarded Nobel Prize for studies on chlorophyll pigments.

How many chlorophyll molecules are found in quantasomes? Quantasomes that are present on the surface of thylakoid membranes contain chlorophyll molecules.

  1. 175 - 200

  2. 190 - 200

  3. 210 - 280

  4. 230 - 250

  5. 50 - 100


Correct Option: D
Explanation:

Quantasomes that are present on the surface of thylakoid membranes contain about 230 chlorophyll molecules.

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