BI110 Chapter 4-12: Notes 4 to 12 chemistry
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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 |
1. (TCO 1) Control subjects in a double-blindtest of a new drug are (Points : 4) informed of what drug they aregetting.
informed of what drug they aregetting but their private physicians are not.
given larger doses of thedrug.
infected with a differentdisease than the experimental subjects.
not given the experimentaldrug but are otherwise treated the same as the experimentalsubjects.
hypothesis experiment theory All of the above |
theories statistical tests correlations predictions |
A group is a column on theperiodic table. The elements in each periodhave similar chemical properties. The A groups contain therepresentative elements. The B groups contain thetransition elements. |
Add up the number of protonsand neutrons in the atom. It is equal to the number ofprotons in the atom. It is equal to the number ofneutrons in the atom. Find the net electrical chargeof the atom. |
20 24 44 58 |
Protons and electrons Protons and neutrons Only electrons Only protons |
Four One Eight Three |
3.01 |