| Lesson 1 Exam |
| Question 1 | 5 / 5 points |
Which of these would be a valid hypothesis?
Question options:
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| Human history is determined by a series of supernatural events. | ||
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| Humans should help in the conservation of other animal species. | ||
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| Humans are controlled by forces beyond our understanding. | ||
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| Humans and bacteria share a common genetic code. | ||
| Question 2 | 5 / 5 points | ||
The following molecule is best described as a: CH3—CH2—CH2—CH2
Question options:
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| protein. | ||
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| carbohydrate. | ||
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| hydrocarbon. | ||
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| lipid. | ||
| Question 3 | 5 / 5 points | ||
Carbohydrates typically include:
Question options:
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| <p> an NH<sub>2</sub> group.</p> | ||
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| C, H, and O atoms. | ||
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| nucleotides. | ||
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| <p> a PO<sub>4</sub> group.</p> | ||
| Question 4 | 5 / 5 points | ||
Taxonomy is the:
Question options:
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| study of cells. | ||
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| naming and classifying of organisms. | ||
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| study of organisms and their interaction with the environment. | ||
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| study of genes. | ||
| Question 5 | 5 / 5 points | ||
An atom with an electrical charge is a(n):
Question options:
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| isotope. | ||
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| molecule. | ||
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| ion. | ||
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| compound. | ||
| Question 6 | 5 / 5 points | ||
__________ is an example of an element.
Question options:
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| Water | ||
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| Carbon | ||
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| Glucose | ||
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| Salt | ||
| Question 7 | 5 / 5 points | ||
A fat that is hydrogenated is:
Question options:
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| more unsaturated. | ||
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| easier to digest. | ||
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| more solid. | ||
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| less likely to cause strokes. | ||
| Question 8 | 5 / 5 points | ||
Sometimes when I have my morning coffee, which I drink black with no sugar, I notice a thin film floating on top of the coffee. Since I have just read Chapter 3 of the text, I now realize the nature of this substance and so I run to my friend screaming, "Look at this __________ in my coffee!"
Question options:
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| hydrophilic substance | ||
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| hydrophobic substance | ||
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| glucose | ||
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| nucleotide | ||
| Question 9 | 5 / 5 points | ||
How many oxygen atoms are in the products of the following reaction?
C6H12O6 + 6 H2O + 6 O2 → 6 CO2 + 12 H2O
Question options:
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| 18 | ||
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| 6 | ||
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| 12 | ||
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| 24 | ||
| Question 10 | 5 / 5 points | ||
In what way(s) is the science of biology influencing and changing our culture?
Question options:
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| By helping us understand the relevance of evolution to human health | ||
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| By revealing how mutations in genes can lead to disease | ||
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| By providing new tools for forensic investigations | ||
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| All of the above | ||
| Question 11 | 5 / 5 points | ||
Science is:
Question options:
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| the inquiry-based effort to describe and explain nature. | ||
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| the search for truth. | ||
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| an organized set of principles for how to ethically and morally behave. | ||
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| All of the above | ||
| Question 12 | 5 / 5 points | ||
People with lactose intolerance do not have enough:
Question options:
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| galactose. | ||
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| lactase. | ||
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| glucose. | ||
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| fructose. | ||
| Question 13 | 5 / 5 points | ||
In the following reaction, what type of bond is holding the two atoms together?
K + Cl → K+ + Cl- → KCl
Question options:
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| Hydrophilic | ||
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| Ionic | ||
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| Hydrophobic | ||
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| Covalent | ||
| Question 14 | 0 / 5 points | ||
Which of these is required for natural selection to occur?
Question options:
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| Inheritance | ||
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| Unequal reproductive success | ||
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| Individual variation | ||
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| All of the above (Incorrect) | ||
| Question 15 | 5 / 5 points | ||
Humans are composed of __________ cells.
Question options:
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| bacterial | ||
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| eukaryotic | ||
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| plant | ||
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| prokaryotic | ||
| Question 16 | 0 / 5 points | ||
The model on the left is not realistic in that:
Question options:
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| neutrons are not located in the nucleus. | ||
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| the electrons should be much farther away from the nucleus. | ||
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| electrons do not orbit the nucleus in a ring shape. (Incorrect) | ||
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| electrons do not have a negative charge. | ||
| Question 17 | 5 / 5 points | ||
Beryllium's atomic mass is 9 and its atomic number is 4. How many neutrons are found in a beryllium atom?
Question options:
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| 9 | ||
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| 13 | ||
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| 4 | ||
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| 5 | ||
| Question 18 | 5 / 5 points | ||
Which of the following is water hydrophilic?
Question options:
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| Cellulose | ||
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| Testosterone | ||
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| Butter | ||
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| Cholesterol | ||
| Question 19 | 5 / 5 points | ||
A base:
Question options:
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| removes H<sub>2</sub>O molecules from a solution.<br/> | ||
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| decreases the pH of a solution. | ||
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| removes OH<sup>—</sup> ions from a solution. | ||
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| removes H<sup>+</sup> ions from a solution. | ||
| Question 20 | 5 / 5 points | ||
Which of the following is a health effect of a diet high in saturated fats?
Question options:
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| Increased blood flow |
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| Decreased risk of atherosclerosis |
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| Increased risk of heart attack |
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| Decreased risk of stroke
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