All GED Science Resources
Example Questions
Example Question #31 : Biology And Life Sciences
What is true about active transport?
Only fat-soluble molecules can undergo active transport.
Molecules always move from high to low concentrations.
Energy is required.
It includes diffusion and osmosis.
Energy is required.
Active transport always requires energy since molecules are being pumped against their concentration gradients by being transported from areas of low concentration to areas of high concentration. Osmosis and diffusion are examples of passive transport and do not require energy.
Example Question #32 : Biology And Life Sciences
If a cell is placed in a hypertonic solution, water will move __________.
in and out of the cell at the same rate
out of the cell
into the cell
nowhere, the water will not move at all
into the cell membrane
out of the cell
In a hypertonic solution, the cell has a greater concentration of water molecules inside it than the solution does. Because of this, the water will move out of the cell in an effort to balance the concentration of water molecules both inside and outside of the cell.
Example Question #33 : Biology And Life Sciences
Which of the following organelles is found in plant cells, but not in animal cells?
Mitochondria
Chloroplast
Golgi body
Smooth endoplasmic reticulum
Chloroplast
One of the primary differences between plant cells and animal cells is that plant cells must be able to undergo photosynthesis. Photosynthesis takes place in the chloroplasts, which contain the pigment chlorophyll. Chloroplasts are not found in animal cells, but are found in plant cells.
Both animal and plant cells contain Golgi bodies, smooth endoplasmic reticulum, and mitochondria.
Example Question #1 : Organelles
Which of the following correctly gives the function of an organelle found within an eukaryotic cell
Ribosomes are responsible for disposal and break down of used and unwanted proteins
The smooth endoplasmic reticulum is responsible for breaking down of unwanted proteins
Mitochondria produce vast stores of ATP (energy) for the cell to use
The Golgi body provides structural support to the cell
Lysosomes are responsible for protein synthesis
Mitochondria produce vast stores of ATP (energy) for the cell to use
Mitochondria are the only organelle defined correctly. The main processes of cell respiration, namely the electron transport chain, occur in the mitochondria to produce energy in the form of ATP. Because of this, mitochondria are known as the "powerhouses" of the cell.
Ribosomes are responsible for transcribing RNA and creating new proteins. The Golgi body packages proteins into vesicles that can be transported out of the cell. Lysosomes contain enzymes that can digest old or damaged proteins. The smooth endoplasmic reticulum is responsible for synthesizing lipids and for degrading toxins, such as alcohol.
Example Question #1 : Organelles
Which RNA-based organelle is the site of protein synthesis within the cell?
Ribosomes
Nucleus
Lysosomes
Mitochondria
Vacuole
Ribosomes
Ribosomes are composed of a unique type of RNA, rRNA, and are located within the cytoplasm of the cell and on the surface of the rough endoplasmic reticulum. Here, proteins are assembled from amino acids piece by piece using instructions copied from DNA.
Example Question #2 : Organelles
Where does ATP synthesis occur within the cell?
Golgi apparatus
Endoplasmic reticulum
Nucleus
Ribosomes
Mitochondria
Mitochondria
The mitochondria are organelles that are often referred to as the "power plant" of the cell. Mitochondria are responsible for extracting energy from food molecules and binding it in the high energy bonds of the ATP molecule.
Example Question #2 : Organelles
What is the function of the Golgi apparatus within the cell?
Manufacturing lipids such as steroid hormones
Digestion of food and waste products
The site of protein synthesis within the cell
Transport of materials packaged in vesicles to other parts of the cell or outside the cell membrane
Synthesis of chemical energy from sunlight
Transport of materials packaged in vesicles to other parts of the cell or outside the cell membrane
The Golgi apparatus can be thought of as the "shipping center" of the cell. Here, proteins and other materials are packaged in vesicles which are transported to other sites in the cell or outside the cell membrane for "export".
Example Question #3 : Organelles
Which of the following organelles is not found in animal cells?
Chloroplast
Ribosomes
Endoplasmic reticulum
Nucleus
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 #3 : Organelles
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 #2 : Organelles
If a cell lacks endoplasmic reticulum (ER), one direct result will be that it cannot __________.
manufacture proteins
secrete proteins
store, alter and package secretory products
produce substantial amounts of ATP
reproduce itself
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.
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