Chemistry of Life
Draw the molecule CO2 with the correct number of atoms and bonds.
Hopefully they got it right
True or false: eukaryotes are the older and simpler cell model.
False: prokaryotes are smaller, simpler, and older
Which chemical process is being indicated in the diagram. Be specific.
The Calvin cycle (step 2 in photosynthesis).
What is the original source of all energy in an ecosystem?
The sun
Quantitatively, how tall is Ms. Almond in feet and inches?
5'8" (68 inches)
What property of water is described below:
An immense amount of energy is required to change water from liquid to gas. Water boils or evaporates at 100 degrees C, while acetone evaporate 56 degrees C.
High specific heat capacity.
True or false: all eukaryotes have a mitochondria and a chloroplast.
False: all euks have mitochondria, but only plants have chloroplasts.
What are the reactants of photosynthesis?
H2O, CO2, and sunlight energy
Which interaction type is described:
Burrowing owls use underground burrows that prairie dogs have abandoned or dug out. Using pre-made shelters saves time and energy for the owls, and the prairie dogs are unaffected by the use of their abandoned homes.
Commensalism (+ 0)
What book-to-movie adaptation is coming out this fall that Ms. Almond is super excited about?
Sunrise on the Reaping (The Hunger Games book #5)
Which macromolecule is the cell's primary energy source?
Carbohydrates (glucose)
What is an organelle eukaryotes and prokaryotes both have?
Acceptable answers: cell membrane, cytoplasm, ribosomes, cell wall
Describe why photosynthesis is an endothermic equation?
Photosynthesis absorbs energy (sunlight) and endothermic reactions absorb energy. The products of photosynthesis have high energy products compared to reactants.
Which trophic level has the lowest amount of energy input?
Tertiary consumers/ apex predators
How many bonds can a Nitrogen atom typically form?
3 (HONC!)
Draw the molecule C2H4O2 the correct number of atoms and bonds.
is it HONCed? Image on slides
What type of cell membrane transport is described below:
After eating, your bloodstream is flooded with glucose molecules. Your cells allow glucose to pass through the cell membrane via protein channels so it can be broken down in cellular respiration.
Facilitated diffusion
Mr. Denning got an office plant on the first day of school. Over the last 2 months, it has doubled in size! Where did the plant get most of the materials it needed to grow?
CO2 in the air and H2O poured into the pot.
If all of the urchins were removed from the kelp forest, how would this affect 3 other populations in the ecosystem?
answers will vary
Raccoons eat berries and herbivorous insects like beetles and grasshoppers. What trophic level(s) applies to the raccoon?
Primary consumer (eating berries) AND secondary consumer (eating insects).
Describe in detail how water's chemical structure leads to its unique properties. Use at least 3 major vocab words from chemistry of life.
Example: Within a water molecule, H atoms are positively charged, and O atoms are negatively charged. These opposing charges, a trait called polarity, create strong attraction between water molecules leading to hydrogen bonds holding molecules together. Hydrogen bonds lead to water's unique properties such as cohesion and adhesion.
Draw each type of cell membrane transport on the diagram within 45 seconds.
Hopefully it's right!
An aquatic snail and plant live together in a clear plastic bottle that sits near a window sill. How can they both survive even if the bottle lid is never opened? Explain using at least 4 major cell energy vocabulary words in your response.
Example: The plant performs photosynthesis to keep itself energized and upright, producing O2 and glucose. The snail absorbs the O2 through its gills and eats the plant's glucose. This allows the snail to do cellular respiration and make ATP energy it needs to survive. While doing cellular respiration, the snail makes CO2 the plant needs to continue doing photosynthesis. This cycle of materials keeps both beings alive.
At Santa Cruz High, the student population is 1,010 on the first day of school. Over the course of the year, 27 students left for other schools (deaths) and 45 new students joined (births). What is the growth rate of the student population for the school year?
r = (births - deaths)/ population size
r = (45-27)/1,010
r = 0.017 (or 1.7%)
Explain why your body gets sore after long periods of exercise. Use at least 2 major vocab words from the cell energy unit.
Example: As you exercise, your cells use O2 to produce large amounts of ATP. As you use up the ATP and O2, your cells switch from aerobic respiration to anaerobic respiration to keep producing energy without oxygen. A product of anaerobic respiration in animals is lactic acid, the chemical that makes you sore.