Questions and answers for exam Preparation

MCQs

Total Questions : 48 | Page 4 of 5 pages

Question 31. Which of the following cell organelles are expected to be associated with motor proteins?

Smooth ER
Vesicles
Plasma membrane
Chloroplasts

Discuss Question

Answer: Option B. -> Vesicles

Question 32. Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization

makes each compartment nutritionally independent of all others
allows for specialization through the subdivision of particular tasks
allows for specialization through merging of different tasks
reduces overall cell size

Discuss Question

Answer: Option B. -> allows for specialization through the subdivision of particular tasks

Question 33. . An organism's first line of defense against attack by an invader such as a virus or bacterium is usually

to flee or hide
its body wall
a specific immune response
a nonspecific immune response

Discuss Question

Answer: Option B. -> its body wall

Question 34. . According to the fluid mosaic model of cell membranes,

the most common type of molecules in the membrane are proteins
basic membrane structure results from how the proteins interact with water
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 35. . The simplest way to differentiate a prokaryotic cell from a eukaryotic one is to

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

Discuss Question

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

Question 36. . Which of the following is the best criterion for deciding whether a cell is prokaryotic or eukaryotic?

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

Discuss Question

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

Question 37. .
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.