MDCAT Cell Biology MCQs 6: Cell Structure & Function

Master MDCAT Cell Biology MCQs with 20 essential practice MCQs covering the fluid mosaic model, organelle functions, active transport, and cell membrane mechanisms. Perfect for PMDC MDCAT preparation. Let us start with online MDCAT CELL Biology MCQs:

 

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#1. Substances cross the cell membrane more easily when they are

Proteins soluble

Water soluble

Lipid soluble

Alcohol soluble

#2. What is the most important difference between active and passive cell transport?

Active transport occurs in animals, passive transport occurs in plant

Active transport require energy input, passive transport does not

Active transport does not use membrane, passive transport always use membrane

Active transport occurs whenever an organisms moves, passive transport dose not involve movement of the organisms

#3. Which of the following properties is incorrect for both mitochondria and chloroplasts?

Both have an electron transport system

ATP synthesis

Both are present in cell

Both are double membrane structure

#4. According to the fluid mosaic model of the cell membrane

The membrane is a highly mobile mixture of phospholipids and proteins

The unique properties of cell types are determined by their pho

The most common type of molecules in the membrane are proteins

Basic membrane structure results from how the proteins interact with water

#5. The nucleus is only visible when the cell is in —————— stage.

Bot Non-dividing and active

Non dividing

Dividing

Active

#6. The free ribosome’s of the mitochondria are present in its

Inter membrane space

On the outer membrane

On the cristae of the inner membrane

Mitochondrial matrix

#7. What is the sequence of organelles that a secreted protein would have passed through on its journey out of the cell?

Mitochondria, Golgi apparatus, cell membrane

Golgi apparatus, rough endoplasmic reticulum, cell membrane

Cellmembrane, mitochondria, Golgi apparatus

Rough endoplasmic reticulum, Golgi apparatus, cell membrane

#8. Eukaryotic cells are more efficient than prokaryotes because of their internal compartmentalization.

Makes each compartment nutritionally independent of all others

Allows of specialization through the subdivision of particular tasks

Allows of specialization through merging of different tasks

Reduces overall cell size

#9. Each cell of a frog contains autosomes

18

26

48

24

#10. Extra nuclear DNA is found in

Lysosomes

Golgi bodies

Mesosomes

Mitochondria

#11. Which of the following moves material against a concentration gradient?

Diffusion

Osmosis

Active transport

Facilitated transport

#12. The attachment of ribosomal subunits is controlled by —————— ions

$Ca^{2+}$

$Mg^{2+$}$

$Na^+$

$K^+$

#13. Which of the following statements best describes the fluid mosaic model of the plasma membrane

Sheet of protein

Sugar Phosphate backbone

Phospholipids bilayer

Complementary base template

#14. According to fluid mosaic model, plasma membrane presents

Unit membrane structure

A miceller structure

A quasi-fluid structure

A polar structure

#15. Passage through pores in the nuclear envelope is restricted primarily to

Lipids and glycolipids

DNA and RNA

Proteins < RNA and protein RNA complexes

RNA and protein carbohydrate complexes

#16. Which of the following is also called bulk transport

Both Endocytosis and Active transport

Endocytosis

Exocytosis

Active transport

#17. Which of the following cell organelles produces secretory vesicles?

Golgi apparatus

Mitochondrion

Lysosome

Rough endoplasmic reticulum

#18. Two functions of a rough endoplasmic reticulum are to

Synthesis and transport pertains

Modify and active hormones

Join with and activate hormones

Detoxify and transport drugs

#19. An organelle composed of membranous tubules that synthesizes testosterone is the

Vacuole

Golgi apparatus

Rough endoplasmic reticulum

Smooth endoplasmic reticulum

#20. Prokaryotic cells are different from eukaryotic cells in that prokaryotic cells lack

Ribosome's

Cell wall

Mitochondria

Cell membrane

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Online MDCAT CELL Biology MCQS Test with Answers

• The attachment of ribosomal subunits is controlled by —————— ions
• According to the fluid mosaic model of the cell membrane
• Each cell of a frog contains autosomes
• The nucleus is only visible when the cell is in —————— stage.
• The free ribosomes of the mitochondria are present in its
• Two functions of a rough endoplasmic reticulum are to
• An organelle composed of membranous tubules that synthesizes testosterone is the
• Prokaryotic cells are different from eukaryotic cells in that prokaryotic cells lack
• Substances cross the cell membrane more easily when they are
• Which of the following properties is incorrect for both mitochondria and chloroplasts?
• Eukaryotic cells are more efficient than prokaryotes because of their internal compartmentalization.
• Passage through pores in the nuclear envelope is restricted primarily to
• Which of the following is also called bulk transport
• Extranuclear DNA is found in
• According to the fluid mosaic model, the plasma membrane presents
• What is the most important difference between active and passive cell transport?
• Which of the following statements best describes the fluid mosaic model of the plasma membrane
• Which of the following cell organelles produces secretory vesicles?
• Which of the following moves material against a concentration gradient?
• What is the sequence of organelles that a secreted protein would have passed through on its journey out of the cell?

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