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Biology Semester 1
Question | Answer |
---|---|
You are completing an experiment and change your data to better fit your hypothesis. Why is this wrong? | You have introduced bias. |
1 millimeter = 1000 micrometers How many millimeters in 5 micrometers? | 5 x 10^-3 millimeters |
In an experiment, you change the pH of the watering solution but you keep the temperature, soil, and number of seeds the same. How would you describe those variables? | Controlled variables |
How many experimental variables can you use in an experiment? | One per experiment |
On which axis would you find the independent variable on a graph? | x-axis |
Why does ice float? | Water is less dense as a solid than a liquid. |
What is the pH range for a basic substance? | >7 |
What is an organic compound? | Anything that contains carbon |
Which macromolecule is the main source of energy? | carbohydrates |
Which macromolecule is the main component of the cell membrane? | lipid |
What is the building block (monomer) for carbohydrates? | monosaccharide |
What is the building block (monomer) for proteins? | amino acids |
Which vitamin helps in wound healing? | Vitamin C |
An enzyme is which type of macromolecule? | protein |
Why do high temperatures often negatively affect enzyme activity? | High temps can denature a protein (enzyme) |
Why is water attracted to the head of the phospholipids that make up the cell membrane? | Polarity |
Which type of molecule is often found in the cell membrane to act as a channel for ions or large particles to pass through? | Protein |
What is it called when substances move from an area of higher concentration to an area of lower concentration? | Diffusion |
What is it called when water moves from an area of higher concentration to an area of lower concentation? | osmosis |
If a cell normally lives in a 5% saltwater environment, what would happen to the cell if it was placed in a 0% saltwater environment? | The cell would swell (increase) in size because water would enter the cell. |
If a cell normally lives in a 5% saltwater environment, what would happen to the cell if it was placed in a 5% saltwater environment? | The cell would stay the same size because water would move in and out of the cell at an equal rate. |
If a cell normally lives in a 5% saltwater environment, what would happen to the cell if it was placed in a 10% saltwater environment? | The cell would shrink (decrease) in size because water would exit the cell. |
What are the reactants (starting molecules) for cellular respiration? | glucose (C6H12O6) and oxygen (O2) |
What are the reactants (starting molecules) for photosynthesis? | carbon dioxide (CO2) and water (H2O) |
What are the products(ending molecules) for cellular respiration? | carbon dioxide (CO2) and water (H2O) |
What are the products(ending molecules) for photosynthesis? | glucose (C6H12O6) and oxygen (O2) |
Which process uses the mitochondria to release energy from sugars? | cellular respiration |
What is required in order for photosynthesis to occur? | Light, water, carbon dioxide |
What is anaerobic respiration? | Process that makes energy without oxygen |
What is aerobic respiration? | Process that makes energy with oxygen |
How are photosynthesis and cellular respiration related? | The products of one are the reactants of the other |
Which type of cell performs photosynthesis? | plant cells |
Which type of cell performs cellular respiration? | all cells |
Some bacteria can use inorganic compounds to make their food. What is this process called? | chemosynthesis |
What is the main component of the cell wall? | cellulose |
Which organelle controls what enters and leaves the cell? | cell membrane |
Which organelle directs cell activities? | nucleus |
Which organelle performs photosynthesis? | chloroplast |
Which organelle/structure would be found in plant cells but not animal cells? | Chloroplast, cell wall |
Three cells are observed under the microscope and magnified so that they all appear to be the same size. Cell A was magnified 5x, Cell B was magnified 10x, and Cell C was magnified 20x. Which cell is the smallest? | Cell C |
What is the difference between a prokaryotic and eukaryotic cell? | Prokaryotic- no nucleus Eukaryotic- nucleus |
Give an example of a prokaryotic cell. | Bacteria |
Which type of tissue is plants is responsible for transporting water and nutrients? | vascular tissue |
Amoebas move by extending "false feet" called ________. | pseudopodia |
Sperm have a whip-like tail that is used for movement called a __________. | Flagellum (flagella) |
Which body system is responsible for transport and regulating temperature? | circulatory |
Which body system releases hormones to help control and regulate the body? | endocrine |
Which body system controls other systems, such as muscular? | nervous |
Which body system gets rid of waste? | excretory |
Maintaining a constant internal environment is called __________. | homeostasis |
The pancreas regulates blood sugar by releasing insulin when glucose is too high and glucagon when levels are too low. This is known as _________. | Feedback |
What is a stimulus and response? | Cause and effect |
*HONORS* In an experiment to test the effect of pH on growth, one plant was given water and one plant was given vinegar. What is the control? | Plant that was given water |
*HONORS* True or false: enzymes are unchanged in a reaction and may be reused. | True |
*HONORS* Which type of fermentation occurs in muscle cells and causes fatigue & soreness? | lactic acid |
*HONORS* In an experiment, how could you determine the rate of photosynthesis? | Measure the amount of oxygen (bubbles) produced |
*HONORS* Which systems are most involved in regulation? | Nervous & endocrine |