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

Inter membrane space

On the cristae of the inner membrane

On the outer membrane

Mitochondrial matrix

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

Vacuole

Rough endoplasmic reticulum

Golgi apparatus

Smooth endoplasmic reticulum

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

A quasi-fluid structure

A miceller structure

A polar structure

Unit membrane structure

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

Cell wall

Ribosome's

Mitochondria

Cell membrane

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

Lysosome

Mitochondrion

Rough endoplasmic reticulum

Golgi apparatus

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

ATP synthesis

Both are double membrane structure

Both are present in cell

Both have an electron transport system

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

Active transport

Osmosis

Diffusion

Facilitated transport

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

The most common type of molecules in the membrane are proteins

Basic membrane structure results from how the proteins interact with water

The unique properties of cell types are determined by their pho

The membrane is a highly mobile mixture of phospholipids and proteins

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

Dividing

Non dividing

Bot Non-dividing and active

Active

#10. Extra nuclear DNA is found in

Mesosomes

Lysosomes

Golgi bodies

Mitochondria

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

Modify and active hormones

Join with and activate hormones

Detoxify and transport drugs

Synthesis and transport pertains

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

Reduces overall cell size

Allows of specialization through merging of different tasks

Makes each compartment nutritionally independent of all others

Allows of specialization through the subdivision of particular tasks

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

Proteins soluble

Alcohol soluble

Water soluble

Lipid soluble

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

Exocytosis

Endocytosis

Active transport

Both Endocytosis and Active transport

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

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

Active transport require energy input, passive transport does not

Active transport occurs in animals, passive transport occurs in plant

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

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

Complementary base template

Sugar Phosphate backbone

Sheet of protein

Phospholipids bilayer

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

DNA and RNA

Proteins < RNA and protein RNA complexes

Lipids and glycolipids

RNA and protein carbohydrate complexes

#18. 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

Cellmembrane, mitochondria, Golgi apparatus

Rough endoplasmic reticulum, Golgi apparatus, cell membrane

Golgi apparatus, rough endoplasmic reticulum, cell membrane

#19. Each cell of a frog contains autosomes

24

26

48

18

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

$Na^+$

$K^+$

$Mg^{2+$}$

$Ca^{2+}$

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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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