SC 135 - Fourth Exam Spring 2011 - Answer Key
Links connect to relevant parts of the online book.
On the line to the left, place the letter of the choice that best answers the question.
Three Points Each. NOTE: "e" answers are never the correct answer.
1. Fusion is something that happens to
___C___ a. Electrons during photosynthesis b. Light frequencies during photosynthesis c. Nuclei during fertilization
d. Enzymes during inhibition e. Stuff that fuses, yo?
...the haploid sperm and egg cell nuclei fuse into the diploid zygote nucleus.
2. The most likely type of molecular complexes to have led to Life:
___B___ a. Carbohydrates b. RNAs c. DNAs d. Water e. Living
...RNA has abilities later taken on by proteins (chemistry) and DNA (coding) - but RNA can do both.
3. How particular a protein is for attaching to a substrate is called
___B___ a. Selectivity b. Specificity c. Exclusivity d. Attachability e. Sluttiness
...they've used an English word, but which one?
4. The breaking of what usually leads to denaturation?
___D___ a. Amino acids b. Covalent bonds c. Ionic bonds d. Hydrogen bonds e. De nature bonds, mon.
...H bonds are most of what keeps a protein "wrapped up" in the right shape - unwrapping is denaturation.
5. The critical type of energy for chemosynthesis at hydrothermal vents is
___C___ a. Ions b. ATP c. Heat d. Light e. Enthusiasm
...it's based on heat-energized chemicals.
6. Which is true?
a. Spindles are made at the centrioles and attach to centromeres
b. Centromeres are made at the centrioles and attach to spindles
___A___ c. Centrioles are made at the spindle and attach to centromeres
d. Spindles are made at the centromeres and attach to centrioles
e. The things you read when you don=t have a dartboard...
...it does get pretty confusing.
7. Plants require a nitrogen source so that they can
___B___ a. Capture sunlight b. Make proteins c. Move water d. Make ATP
e. Impress the lady plants
...it's used to make amino acids, the components of proteins.
8. The idea that Life originated elsewhere and was brought to the early Earth is known as
___A___ a. Panspermia b. Translocation c. Transplantation
d. Extrasolar origins e. Uninvited guest hypothesis
...from pan = widespread and spermia = seeding.
9. Evolution changes used to be seen in _____, but now scientists look for changes in _______.
___B___ a. Traits...membranes b. Populations...gene pools c. Genes...mutations
d. Proteins...enzymes e. Magazines...internet sites
...it has to be something that applies to groups, because evolution only happens to groups over time.
10. The main positive effect of the Snowball Period was probably
___D___ a. Spread plants to land b. Connected land masses c. Allowed mammals to flourish
d. Increased competition e. It was really fun
...this massive ice age reduced available resources and living space drastically.
11. What runs essentially just like mitosis?
___D___ a. Crossing over b. Fertilization c. Meiosis I d. Meiosis II e. The Bachelor
...the only difference is that there's only one set of chromosomes to work with.
12. Aerobic respiration is approximately how many more times efficient than anaerobic respiration?
___C___ a. 1000 b. 100 c. 20 d. 2 e. I thought that math was off-limits...
Answer any eight of the following questions for 4 Points Each.
Note: if you answer more than eight, only the first eight will be corrected.
You can get partial credit on these answers.
Answer any four of the following questions for Eight Points Each.
Note: if you answer more than four, only the first four will be corrected.
You can get partial credit on these answers.
Answer as many as you are able. Wrong answers will not result in points being lost from the main exam. You can get partial credit on these answers.
Animal cell cytokinesis can happen in which stage / stages of the cell cycle? Three Points.
What structure is present in animal cell mitosis but not supposed to be present in plant cell mitosis? Three Points.
What organisms actually get a second use out of their polar bodies? Three Points.
What=s the difference between an embryo and a fetus? Three Points.
What type of organisms has mechanical isolation been found in? Three Points.
Folks who claim that Life had to have been created because it breaks the 2nd Law of Thermodynamics are forgetting what important detail about the Law? Three Points.
Any trait produced by a pathway has to be a multiple-gene trait. Why? Three Points.
What are the other terms for substrates? Three Points Each.
What often produce irreversible enzyme inhibitions? Three Points.
What are calories actually a measurement of? Three Points.
Where can the parts of primordial soup still be found? Three Points Each.
What causes reradiation? Five Points.