The presence of cholesterol in the plasma membranes of some animals.

1. enables the membrane to stay fluid more easily when cell temperature drops.

2. enables the animal to remove hydrogen atoms from saturated phospholipids.

3. enables the animal to add hydrogen atoms to unsaturated phospholipids.

4. makes the membrane less flexible, allowing it to sustain greater pressure from within the cell.

Subtopic:  Cell Membrane |
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Prokaryotic cells have something unique in the form of:

(1) Inclusion bodies

(2) Plasmids

(3) Cell wall

(4) 70 S ribosomes

Subtopic:  Prokaryotic Cell Organisation |
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Under which of the following conditions would you expect to find a cell with a predominance of free ribosomes?

1. a cell that is secreting proteins

2. a cell that is producing cytoplasmic enzymes

3. a cell that is constructing its cell wall or extracellular matrix

4. a cell that is digesting food particles

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Gas vacuoles allow cyanobacteria to:

1. Store carbon dioxide for assimilation

2. Control their buoyancy

3. Provide anaerobic conditions to nitrogenase

4. Eliminate toxic ammonia

Subtopic:  Ribosome and Inclusion Bodies |
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The lipid component of the plasma membrane mainly consists of:

1. Triglycerides

2. Cholesterol

3. Phosphoglycerides

4 Proteins

Subtopic:  Cell Membrane |
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Carotenoid pigments are found in:

I. Chloroplasts

II. Chromoplasts

III. Leucoplasts

(1) Only I

(2) Only I and II

(3) Only II

(4) I, II and III

Subtopic:  Plastids |
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Microbodies, which help to convert stored lipids into carbohydrates so they can be used for plant growth, are known as:

1. Peroxisomes

2. Sphaerosomes

3. Glyoxysomes

4. Lysosomes

 

Subtopic:  Microbodies |
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Ribosomes are produced in

1. Nucleolus

2. Mitochondria

3. Cytoplasm

4. Golgibody

Subtopic:  Nucleus |
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All the following are the part of a eukaryotic cell endomembranous system except:

1. Vacuole

2. Lysosome

3. Golgi complex

4. Mitochondria

Subtopic:  Endomembrane System (Endopasmic Reticulum) |
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A feature unique to prokaryotes would be:

1. A cell wall not made up of cellulose

2. An extrachromosomal plasmid DNA

3. A cell membrane of peptidoglycan

4. Presence of inclusions

Subtopic:  Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
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