Question

In: Biology

1.Lipids a.Yield less energy per gram than do carbohydrates b.Include cartilage and chitin c.Include fats consisting...

1.Lipids

a.Yield less energy per gram than do carbohydrates

b.Include cartilage and chitin

c.Include fats consisting of one fatty-acid molecule and three glycerol molecules

d.Are composed of monosaccharides

e.None of the above

2.The endoplasmic reticulum

a Serves as the internal transportation system of a cell

b Is the inner membrane of the mitochondria

c Is characterized by the presence of ribosomes throughout

d Manufactures ATP

e Is found in the nucleus as well as in the cytoplasm

3.

Photosynthesis is associated with all of the following EXCEPT

a Chloroplasts

b Plastids

c Grana

d Thylakoid

e Vacuoles

4.

Which type of organelle can break down substances without oxygen and in a low pH environment?

a Peroxisome

b Lysosome

c Central vacuole

d Mitochondria

5.

Which statement is true of plasma membranes?

a They have molecules on their surfaces that identify them

b They are essentially impermeable

c They are basically static, nonchanging structures

d They are hydrophilic barriers between cells

e They function primarily through the activity of their carbohydrates

Expert Solution

Answer=

1.Lipids

c.Include fats consisting of one fatty-acid molecule and three glycerol molecules

explaination=Fatty acid is a one type of lipid monomer ,consists of one carboxyl group at the end of a linear hydrocarbon containing at least four carbon atoms.

2.The endoplasmic reticulum

c Is characterized by the presence of ribosomes throughout

explaination=The ribosomes are present on the surface of endoplasmic reticulum called as rough endoplasmic reticulum.

INCORRECT OPTIONS

a Serves as the internal transportation system of a cell -GOLGI COMPLEX perform this function.

b Is the inner membrane of the mitochondria-is a separate organelle not a part of other organelle.

d Manufactures ATP - This process occurs in mitochondria.

e Is found in the nucleus as well as in the cytoplasm

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3.

Photosynthesis is associated with all of the following EXCEPT

e Vacuoles

explaination= Vacuole is usually found in all plant and fungal cells ,as well as some cells of protists,animals and bacteria.

These are central vacuole these are large containers they can be used to contain cellular waste and to isolate materials that may be harmfull to cell.

INCORRECT OPTIONS=All these are parts of chloroplast & are part of photosynthesis.

a Chloroplasts

b Plastids

c Grana

d Thylakoid

======================================================================================

4.

Which type of organelle can break down substances without oxygen and in a low pH environment?

b Lysosome

explaination=is a membrane bound organelle ,found in cytoplasm of eukaryotic cells,which contains digestive enzymes.

these enzymes can break down substances without oxygen.

=====================================================================================

gladiator answered 1 year ago

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