Cell Biology Quiz

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Which characteristic is NOT true for prokaryotic cells?

They are typically single-celled organisms.

They are generally smaller than eukaryotic cells.

They lack membrane-bound organelles.

They have a true nucleus. (correct)

What is the primary function of the rough endoplasmic reticulum (RER)?

Energy production

Detoxification

Protein synthesis and transport (correct)

Lipid synthesis

How does compartmentalization benefit eukaryotic cells?

It eliminates the need for transport proteins.

It allows for specialization of functions. (correct)

It simplifies cellular processes.

It decreases the surface area of the cell.

Which organelle is primarily responsible for energy production in eukaryotic cells?

Mitochondria Signup and view all the answers

What is a major difference between plant and animal cells concerning organelles?

Plant cells have a cell wall for structure. Signup and view all the answers

What is a key characteristic of prokaryotic cells?

They lack a nuclear membrane. Signup and view all the answers

Which of the following is a distinguishing feature of eukaryotic cells compared to prokaryotic cells?

Possession of a nucleus. Signup and view all the answers

What does cell compartmentalization refer to?

Distribution of organelles within the cytoplasm. Signup and view all the answers

What mechanism is primarily responsible for the selective transport of substances across the plasma membrane?

Active transport using ATP directly. Signup and view all the answers

Which of the following is NOT a difference between plant and animal cells?

Plant cells contain lysosomes for digestion. Signup and view all the answers

In terms of the fluid mosaic model, what role do the embedded proteins play?

They facilitate various cellular functions including signaling. Signup and view all the answers

What is the lower limit for cell size primarily determined by?

The components essential for cellular function. Signup and view all the answers

How does increasing magnification generally affect resolution in microscopy?

Magnification does not guarantee better resolution. Signup and view all the answers

Which of the following accurately describes the role of chloroplasts in plant cells?

Site of photosynthesis, converting light energy into chemical energy Signup and view all the answers

What is the primary function of the central vacuole in plant cells?

Storage and maintenance of turgor pressure Signup and view all the answers

Which feature is exclusive to animal cells compared to plant cells?

Centrioles involved in cell division Signup and view all the answers

In which direction do molecules move during passive transport?

From high to low concentration Signup and view all the answers

Which process requires energy to move substances across the cell membrane?

Active transport Signup and view all the answers

What occurs to a red blood cell placed in a hypertonic solution?

It shrinks and may crenate Signup and view all the answers

Which of the following correctly identifies a characteristic of the lipid bilayer?

Selectively permeable to ions and molecules Signup and view all the answers

What distinguishes endocytosis from exocytosis?

Endocytosis involves the formation of vacuoles, while exocytosis expels substances from the cell Signup and view all the answers

What is the function of gap junctions in cell junctions?

Allow for direct communication between adjacent cells Signup and view all the answers

Which type of organic molecule is primarily involved in creating enzymes?

Proteins Signup and view all the answers

What is the primary function of lysosomes?

Digestion and recycling of cellular waste Signup and view all the answers

Which organelle is responsible for ribosome synthesis?

Nucleus Signup and view all the answers

How do microfilaments contribute to cellular functions?

Facilitate movement and maintain shape Signup and view all the answers

Which transport mechanism utilizes ATP to move substances against their concentration gradient?