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 attachment of ribosomal subunits is controlled by —————— ions

$Mg^{2+$}$

$K^+$

$Na^+$

$Ca^{2+}$

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

Proteins < RNA and protein RNA complexes

RNA and protein carbohydrate complexes

Lipids and glycolipids

DNA and RNA

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

Proteins soluble

Alcohol soluble

Water soluble

Lipid soluble

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

Mitochondrion

Lysosome

Golgi apparatus

Rough endoplasmic reticulum

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

Bot Non-dividing and active

Dividing

Non dividing

Active

#6. Each cell of a frog contains autosomes

18

24

26

48

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

Rough endoplasmic reticulum, Golgi apparatus, cell membrane

Cellmembrane, mitochondria, Golgi apparatus

Golgi apparatus, rough endoplasmic reticulum, cell membrane

Mitochondria, Golgi apparatus, cell membrane

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

The membrane is a highly mobile mixture of phospholipids and proteins

Basic membrane structure results from how the proteins interact with water

The most common type of molecules in the membrane are proteins

The unique properties of cell types are determined by their pho

#9. 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

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

Mitochondrial matrix

On the outer membrane

Inter membrane space

On the cristae of the inner membrane

#11. 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

#12. Extra nuclear DNA is found in

Mesosomes

Golgi bodies

Lysosomes

Mitochondria

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

Cell wall

Ribosome's

Mitochondria

Cell membrane

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

A miceller structure

A polar structure

A quasi-fluid structure

Unit membrane structure

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

Active transport

Both Endocytosis and Active transport

Endocytosis

Exocytosis

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

Rough endoplasmic reticulum

Golgi apparatus

Vacuole

Smooth endoplasmic reticulum

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

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

Active transport occurs in animals, passive transport occurs in plant

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

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

Allows of specialization through merging of different tasks

Reduces overall cell size

Allows of specialization through the subdivision of particular tasks

Makes each compartment nutritionally independent of all others

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

Complementary base template

Phospholipids bilayer

Sheet of protein

Sugar Phosphate backbone

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

Osmosis

Active transport

Facilitated transport

Diffusion

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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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