Biology EOC practice
Using a microscope in the science lab, Jill observed two unknown cells: Cell 1 and Cell 2. Cell 1 she identified as a plant cell and Cell 2 as an animal cell. Her teacher told her she identified the cells correctly. What did Jill most likely observe to correctly identify the cells?
2 and 4
A specific type of cell is being studied by a scientist. She notices the cell contains a nucleus, lysosomes, a cell membrane and cell wall. What is the correct classification of this cell?
A eukaryotic plant cell
Using a microscope in the science lab, Jill observed two unknown cells: Cell 1 and Cell 2. Cell 1 she identified as a plant cell and Cell 2 as an animal cell. Her teacher told her she identified the cells correctly. What did Jill most likely observe to correctly identify the cells?
Cell 1 had a cell wall and Cell 2 did not.
And pure water a red blood cell from an animal will swell and burst but a leaf cell from a plant will not. Which structure in the leaf cell is responsible for this difference?
Cell wall
Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigation resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?
Cells form for through spontaneous generation
Resistance to antibiotics results from variations in the genetic code of Streptococcus pneumoniae. Which type of molecule encodes genetic information in Streptococcus pneumoniae?
Nucleic acid
In living organisms, lipids function mainly as:
Sources of stored energy and components of cellular membranes
Cells found in plants and animals have similarities but can differ in function. Consider the following two organisms: a corn plant cell (Zea mays) and a camel cell (Bactrianus ferus). What is the best explanation for the difference in the cellular vacuole size between these two biotic organisms?
The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage.
What is the advantage of cells being so small?
The cell then has a larger surface area to volume ratio which means it can move nutrients into the cell and waste out more efficiently.
If a cell's lysosomes were damaged, which of the following would most likely occur?
The cell would be less able to break down molecules in its cytoplasm.
Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
Which invention from the 17th century allowed for the development of modern cell theory?
The light microscope
Muscle cells are responsible for obtaining energy so the body can perform voluntary and involuntary movement. Using you knowledge about organelles and muscles, how would a muscle cell differ from other types of animal cells?
The muscle cell would have more mitochondria than the other types of animal cells.
A beaker is divided into two halves, A & B, by a membrane that is freely permeable to the water and NaCl but not to protein. Side A is half-filled with a solution of 8% protein, while side B is half filled with a 2% protein solution. Predict what would happen to side A after a few hours.
The number of water molecules has increased.
Cells can be classified into two different categories: prokaryotic and eukaryotic. Which of the following information is needed in order to determine if an organism is prokaryotic?
The organism's internal structures.
Which characteristic the most plants have in common?
They are autotrophic
Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?
Water expands and becomes less dense when it freezes.
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?
Water has a high capacity for heat.
Maria, after finding no cold sodas in the refrigerator, placed a can of soda in the freezer. She then proceeded to check her social networking site and forgot about the soda. Later that evening her brother went to get some ice and it was brown. Maria's soda can had split open. What is the best explanation for what happened?
When the water froze, the space between hydrogen molecules expanded
When Streptococcus pneumoniae are exposed to an antibiotic, the bacteria try to pump the antibiotic out of their cells. Which of the following mechanisms is most likely used by the Streptococcus pneumoniae to pump the antibiotic out of their cells?
active transport
Baby food manufacturers sometimes use proteases in their products. Proteases catalyze the breakdown of the proteins in these foods, making digestion easier for infants. Proteases are which of the following types of molecules?
enzyme
If a cell's lysosomes were damaged, which of the following would most likely occur?
facilitated diffusion
In an emergency trauma room, a doctor accidentally gives a patient a large transfusion of distilled water directly into one of his veins instead of blood. Predict what might happen if distilled water was given to the patient instead of blood.
have serious, perhaps fatal effects because the red blood cells would tend to burst
Carrot sticks that are left in a dish of freshwater for several hours become stiff and hard. Similar sticks left in a saltwater solution become limp and soft. From this we can deduce that the freshwater is ______ and the saltwater is ________ to the cells of the carrot sticks.
hypotonic, hypertonic
The rough endoplasmic reticulum is a cell structure that consists of folded membranes that contain ribosomes. What is the advantage of the folded membranes?
increases surface area in order to produce more proteins
Which macromolecule makes up the majority of the cell membrane?
lipid
Which of the following functions does active transport perform in a cell?
moving substances against a concentration gradient
