BIO206H5 Chapter Notes - Chapter 2: Covalent Bond, Non-Covalent Interactions, Electron Shell
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Movement of vesicles within the cell depends on what cellular structures?
centrioles and motor proteins |
microtubules and motor proteins |
actin filaments and motor proteins |
actin filaments and microtubules |
actin filaments and ribosomes |
Why is water considered a polar molecule?
The negatively charged oxygen atom attracts the positively charged hydrogen atoms. |
The oxygen is found between the two hydrogens. |
It remains liquid even at very low temperatures. |
Both hydrogens are at one end of the molecule, and oxygen is at the other end. |
Its electrons spend more time with its oxygen than with either hydrogen. |
Which of the following is a major difference between prokaryotic cells and eukaryotic cells?
Prokaryotes have cells while eukaryotes do not. |
Eukaryotic cells have more intracellular organelles than prokaryotes. |
Prokaryotes are generally larger than eukaryotes. |
Prokaryotes are not able to carry out aerobic respiration, relying instead on anaerobic metabolism. |
Which of the following is not a necessary component of life?
needs energy |
uses DNA for heredity |
breathes oxygen |
irritability |
depends on other living forms |
Lipids _____.
contain less energy than proteins and carbohydrates |
are made by dehydration reactions |
are insoluble in water |
contain sulfur polymers |
are made from glycerol, fatty acids, and nitrogen |
What is biology?
the study of life |
the study of genetics |
the study of biomes |
the study of the environment |
the naming and classifying of species |
_____ is an example of an element.
Methane |
Water |
Carbon |
Salt |
Glucose |
With what are saturated fats saturated?
carbon |
nitrogen |
hydrogen |
phosphorus |
oxygen |
Beryllium's atomic mass is 9, and its atomic number is 4. How many neutrons are found in a beryllium atom?
2 |
5 |
13 |
9 |
4 |