Questions and answers for exam Preparation

MCQs

Total Questions : 48 | Page 2 of 5 pages

Question 11. The highly folded membranes found in such eukaryotic organelles as mitochondria and chloroplasts

increase the surface area where key chemical processes can occur
assist with cell movement
make it possible to package large amounts of DNA within the cell
help the cell against physical damage

Discuss Question

Answer: Option A. -> increase the surface area where key chemical processes can occur

Question 12. The simplest way to differentiate a prokaryotic cell from a eukaryotic one is to

determine if the cell is an entire organism or not
check for the presence of DNA
look for a plasma membrane
see if a nucleus is present

Discuss Question

Answer: Option D. -> see if a nucleus is present

Question 13. According to the fluid mosaic model of cell membranes,

basic membrane structure results from how the proteins interact with water
the most common type of molecules in the membrane are proteins
the membrane is a highly mobile mixture of phospholipids and proteins
the unique properties of cell types are determined by their phospholipids

Discuss Question

Answer: Option C. -> the membrane is a highly mobile mixture of phospholipids and proteins

Question 14. Lysosomes are specialized vesicles in __________ that contain digestive enzymes for the breakdown of food. A related organalle known as a vacuole, which is found in __________ , also contains enzymes but in addition may act as a storage organelle for nutrients or water.

animals; plants and fungi
plants and fungi; animals
animals and plants; fungi
plants; animals and fungi

Discuss Question

Answer: Option A. -> animals; plants and fungi

Question 15. Which of the following is the best criterion for deciding whether a cell is prokaryotic or eukaryotic?

The cell has a nucleus or not
DNA is present in the cell or not
The cell has cytosol or not
The cell came from a single-celled or multicelled organism

Discuss Question

Answer: Option A. -> The cell has a nucleus or not

Question 16. Which of the following statements about prokaryotes is false?

Prokaryotic cells concentrate important materials for the cells survival
Prokaryotic cells are much smaller than most eukaryotic cells
The substance known as cytosol is found within the bacterial nucleus
Ancient prokaryotes may have given rise to some eukaryotic organelles

Discuss Question

Answer: Option C. -> The substance known as cytosol is found within the bacterial nucleus

Question 17. Which of the following macromolecules are found in the plasma membrane?

Proteins only
Lipids and proteins only
Proteins and carbohydrates only
Lipids, proteins, and carbohydrates

Discuss Question

Answer: Option D. -> Lipids, proteins, and carbohydrates

Question 18. Clearly defined nucleus, mitochondria in a large central vacuole and chloroplasts, indicate the group of organisms from

animals
bacteria
plants
fungi

Discuss Question

Answer: Option C. -> plants

Question 19. In which of the following cell organelles, it is expected to find the biochemical reactions that harness energy from the breakdown of sugar molecules to synthesize large amounts of ATP?