The growth of an organism is a
A paramecium ingesting a bacterial cell is an example of which step in metabolism?
The evolution of a population of organisms is a
What is the basic structural unit of which all living things are composed?
Prokaryotic cells lack
Proteins with attached carbohydrates or fats on the cell membrane function in
|A)||the identification of cells.|
|B)||the metabolism of sugars.|
|C)||structural support for the cell.|
|D)||transporting materials into and out of the cell.|
Chitin is the main constituent of the cell
|A)||Chitin is the main constituent of the cell membrane of plants.|
|B)||wall of fungi.|
|C)||wall of plants.|
In diffusion, molecules move from areas of _____ concentration to areas of _____ concentration.
The movement of oxygen into cells from the bloodstream is accomplished through
ells of fresh water organisms are _____ compared to the surrounding water.
Increasing the rate of diffusion through the use of specific carrier proteins is termed
Individual cells are limited in their maximum size because their _____ increases faster than their _____ as the cell grows larger.
|B)||surface area, volume|
|C)||diffusion, surface area|
|D)||volume, surface area|
he organelle involved in the transport of materials within the cell is the
Contractile vacuoles are necessary for maintaining water balance in single-celled _____ organisms.
The organelle that serves as the "power plant" for the cell is the
Which of the following are double-membrane organelles?
|D)||both a and b|
Antibiotics like streptomycin affect the function of_____ in bacteria.
Which of the following is the correct order for the stages of mitosis?
|A)||telophase, prophase, anaphase, metaphase|
|B)||anaphase, telophase, prophase, metaphase|
|C)||prophase, metaphase, anaphase, telophase|
|D)||prophase, anaphase, telophase, metaphase|
During which stage is DNA replicated?
During which stage are the chromatids pulled to opposite poles?
uring which stage do the chromosomes align themselves at the cell's equatorial plane?
During which stage does the nuclear membrane disappear?
During which stage does the nuclear membrane reappear?
Osmosis is the diffusion of ____ across a selectively permeable membrane.
Solution A contains 20% sugar and 80% water. Solution B contains 30% sugar and 70% water. The two solutions are separated by a semi-permeable membrane. Which of the following is true?
|A)||solution A is hypotonic to solution B|
|B)||solution A is hypertonic to solution B|
|C)||water will flow from solution B to solution A|
|D)||the solutions are isotonic|
Algae, protozoa, fungi, plants and animals are all comprised of
A series of enzyme-controlled reactions is often called
|A)||a biochemical pathway.|
|B)||a metabolic pathway.|
|C)||both A and B.|
|D)||none of these.|
Enzymes operate by lowering the amount of energy needed to get a reaction going called
To transfer the right amount of chemical-bond energy from energy-releasing to energy-requiring reactions, cells use the molecule
In algae and the leaves of green plants, photosynthesis occurs in cells that contain
Which is NOT a stage in photosynthesis?
|C)||light independent reactions|
A hypotonic solution has ____ solutes (dissolved material) and more solvent (water).
|D)||none of these is true|
Which is not a stage in aerobic cellular respiration?