Question

Which one of the major classes of organic molecules is hydrophobic and includes substances which are used by mammals for long-term energy storage?

A. Lipids

B. Enzymes

C. Nucleic Acids

D. Proteins

E. Carbohydrates

Which subcellular structure looks like a series of interconnected tubes with ribosomes attached, and functions to create proteins for export from the cell.

Group of answer choices

A. Rough endoplasmic reticulum.

B. Golgi apparatus.

C. Lysosome.

D. Smooth endoplasmic reticulum.

E. Endocytotic vesicles.

Which pair of subcellular structures can be found in animal cells, but not in plant cells?

Group of answer choices

A. Centrioles and mitochondria.

B. Golgi apparatus and mitochondria.

C. Lysosomes and centrioles.

D. Smooth endoplasmic reticulum and ribosomes.

E. C. Golgi apparatus and lysosomes.

Answer 1

Answer: (A) lipid is one of the major classes of organic molecules is hydrophobic and include substances which are used by mammals for long term energy storage. Lipid is made up of glycerol and fatty acids. It is hydrophobic in nature and act as storage molecule.

Answer: (A) rough endoplasmic reticulum is a subcellular structure where synthesis of protein occurs due to attachment of ribosome on the surface of reticulum. As for synthesis of protein presence of ribosome is must.

Answer: (C) lysosomes and centrioles found is animal cells but absence in plant cells. Rest of the given options like endoplasmic reticulum, golgi apparatus, mitochondria do found in plant cell. So option (C) is the best choice.

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