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Example Questions
Example Question #34 : Cells And Life
Which of the following organelles is not found in animal cells?
Nucleus
Ribosomes
Endoplasmic reticulum
Chloroplast
Mitochondria
Chloroplast
The chloroplast is unique to plant cells (and some bacteria and protists), and is the site of photosynthesis. Almost all energy used by life is captured by this organelle. All other answers listed can be found in both plant and animal cells.
Example Question #33 : Biology And Life Sciences
Which of the following is not a membranous organelle?
Golgi apparatus
Lysosome
Mitochondria
Endoplasmic reticulum
Ribosomes
Ribosomes
Nonmembranous organelles are always in contact with cytosol.
Membranous organelles are surrounded by membranes that isolate their contents from the cytosol.
Ribosomes are freely scattered in the cytoplasm and thus are nonmembranous organelles.
Example Question #34 : Biology And Life Sciences
If a cell lacks endoplasmic reticulum (ER), one direct result will be that it cannot __________.
produce substantial amounts of ATP
secrete proteins
store, alter and package secretory products
reproduce itself
manufacture proteins
secrete proteins
One of the functions of the endoplasmic reticulum is to secrete proteins.
It's other functions include: synthesis of secretory products, intracellular storage, transport, and calcium ion storage.
Example Question #41 : Biology And Life Sciences
What are the physical characteristics of mitochondria?
Network of membranous channels extending throughout the cytoplasm
Vesicles containing digestive enzymes
Stacks of flattened membranes containing chambers
Double membrane, with inner membrane folds enclosing metabolic enzymes
Nucleoplasm containing nucleotides, enzymes, nucleoprotiens, and chromatin
Double membrane, with inner membrane folds enclosing metabolic enzymes
Mitochondria are organelles that have an unusual double membrane. An out membrane surround the entire organelle, and a second, inner membrane contains numerous folds, called cristae. Cristae increase the surface area exposes to the matrix of mitochondria.
Example Question #42 : Biology And Life Sciences
What is the outer boundary of the cell that separates the cell contents from the extracellular fluid?
Cytosol
Cell wall
Gated channel network
Plasmalemma (plasma membrane)
Glycocalyx
Plasmalemma (plasma membrane)
The plasmalemma (plasma membrane) has a complex structure composed of phospholipids, proteins, glycolipids, and cholesterol. The phospholipids form two distinct layers that don't allow dissolved ions and water-soluble compounds to cross the plasmalemma. This makes the plasmalemma effective in isolating the cytoplasm from the surrounding fluid environment.
Example Question #36 : Cells And Life
Microscopic examination of a cell reveals that it contains many mitochondria. What does this observation imply about the cell?
The cell has a very low energy requirement
The cell has a high demand for storage of genetic information
The cell has a high demand for removal of damaged organelles or of pathogens
The cell has a very high energy requirement
The cell has a high demand for neutralization of toxic compounds
The cell has a very high energy requirement
Mitochondia produce energy (ATP) required by the cell, if a cell has large amounts of mitochondria this implies the cell has a high energy requirement.
Example Question #31 : Cells And Life
Which of the following is not characteristics shared by both lysosomes and peroxisomes?
Is a vesicle that contains enzymes
Is only found in eukaryotes
Removes damaged organelles or pathogens
Is a membranous organelle
Performs an important function within a cell
Removes damaged organelles or pathogens
Only lysosomes remove damages organelles or pathogens. Peroxisomes degrade fats and other organic compounds as well as neutralize toxic compounds.
Example Question #44 : Biology And Life Sciences
Which is not a major function of the endoplasmic reticulum (ER)?
Synthesis
Transport
Storage
Phagocytosis
Detoxification
Phagocytosis
The ER has four major functions: Synthesis, storage, transport, and detoxification.
Synthesis - ER membrane contains enzymes that manufacture carbohydrates, steroids, and lipids.
Storage - ER holds synthesized molecules absorbed from the cytosol.
Transport - Substances travel from place to place within the cell inside the ER.
Detoxification - Cellular toxins are absorbed by ER and neutralized by enzymes in ER membrane.
Example Question #45 : Biology And Life Sciences
There are tiny structures found inside of every Eukaryotic cell called organelles. Each organelles carries out specific functions.
Which organelle is responsible for converting the chemical energy found in food into ATP (molecules that cells use for energy)?
Mitochondria
Endoplasmic reticulum
Nucleus
Ribosomes
Chloroplast
Mitochondria
The mitochondria is the "powerhouse" of the cell and converts chemical energy (sugars) into ATP during cellular respiration.
Example Question #46 : Biology And Life Sciences
Plants and animals are eukaryotes. They have many cell organelles in common, but there are also some differences.
Which of the following statements is true?
Plant cells have the following organelles that animal cells do not have: chloroplasts, a cell membrane, a large vacuole.
Animal cells have the following organelles that plant cells do not have: centrioles, a cell membrane, and small vacuoles.
Plant cells have the following organelles that animal cells do not have: chloroplasts, a cell wall, and large vacuoles.
Animal cells have the following organelles that plant cells do not have: mitochondria, centrioles, and lysosomes.
Plant cells have the following organelles that animal cells do not have: ribosomes, cell walls, and large vacuoles.
Plant cells have the following organelles that animal cells do not have: chloroplasts, a cell wall, and large vacuoles.
Plant cells have chloroplasts, which is the organelle where photosynthesis takes place, but animal cells do not. Plant cells contain both a cell membrane and a cell wall, but animal cells only have a cell membrane. Plant cells have a large vacuole and animal cells have small vacuoles. Animal cells have centrioles, but plant cells do not. All other organelles are found in both plant and animal cells.
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