This one is certainly B. You are less certain about D and A, so let me attempt to help: It’s not D because a snake is a reptile, which evolved AFTER amphibians (it goes fish -> amphibians -> reptiles). It’s not A because amphibians did not directly evolve from dinosaurs. That’s one of the first answer choices that can easily be eliminated. </p>
<p>5 is definitely A. Two posts up stated that to amino acids are linked together via dehydration synthesis, but as far as I’m aware, it’s not just amino acids. Any monosaccharide is connected via dehydration synthesis to form a polysaccharide (lipids, proteins, carbohydrates, nucleic acids (???) )</p>
<ol>
<li><p>Which of the following statements is true about the Krebs (citric acid) cycle and
the Calvin (light-independent) cycle?
(A) They both result in a net production of ATP and NADH.
(B) They both require a net input of ATP.
(C) They both result in a release of oxygen.
(D) They both take place within the cytoplasmic matrix.
(E) They both are carried out by enzymes located within an organelle matrix.
I believe it is B because Rubisco is attaching a carbon to create RuBP (Ribulose Biphosophate) in the Calvin cycle and in the citric cycle, carbohydrates are being broken down further. Also, both are light independent and thus require photosynthesis (light dependent reaction) for ATP. </p></li>
<li><p>The bonding of two amino acid molecules to form a larger molecule requires
(A) the release of a water molecule
(B) the release of a carbon dioxide molecule
(C) the addition of a nitrogen atom
(D) the addition of a water molecule
(E) an increase in activation energy<br>
The answer is A because peptide bonds are broken by hydrolysis (addition of a water), so the opposite must be true in the formation of a peptide bond.</p></li>
</ol>
<p>I self-studied this last year and got a 5. While I’m freaking out about my French AP tomorrow (really productively, as you can tell), I just wanna remind everyone to really Study The Labs. There’s always some crazy lab FRQ and you need to understand the concepts in the 12 required labs to answer those questions.</p>
<ol>
<li><p>A common feature of starch and glycogen is that molecules of both
(A) form microfibrils that give support to connective tissue fibers
(B) contain repeated monomers of glucose and galactose
(C) are important structural components of plant cell walls
(D) are polymers of glucose
(E) are water-soluble disaccharides</p></li>
<li><p>Which of the following offers the best description of neural transmission across a
mammalian synaptic gap?
(A) Neural impulses involve the flow of K+ and Na+ across the gap.
(B) Neural impulses travel across the gap as electrical currents.
(C) Neural impulses cause the release of chemicals that diffuse across the gap.
(D) Neural impulses travel across the gap in both directions.
(E) The calcium within the axons and dendrites of nerves adjacent to a synapse
acts as the neurotransmitter.</p></li>
</ol>
<p>3.When hydrogen ions are pumped out of the mitochondrial matrix, across the
inner mitochondrial membrane, and into the space between the inner and outer
membranes, the result is
(A) damage to the mitochondrion
(B) the reduction of NAD
(C) the restoration of the Na-K balance across the membrane
(D) the creation of a proton gradient
(E) the lowering of pH in the mitochondrial matrix</p>
<p>And #3 on post 438, I thought it could be B also. Because ATP is needed for the Calvin Cycle. And ATP is needed for glycolysis and that is needed for Krebs cycle.</p>
<ol>
<li>A common feature of starch and glycogen is that molecules of both
(A) form microfibrils that give support to connective tissue fibers
(B) contain repeated monomers of glucose and galactose
(C) are important structural components of plant cell walls
(D) are polymers of glucose
(E) are water-soluble disaccharides
D </li>
<li>Which of the following offers the best description of neural transmission across a
mammalian synaptic gap?
(A) Neural impulses involve the flow of K+ and Na+ across the gap.
(B) Neural impulses travel across the gap as electrical currents.
(C) Neural impulses cause the release of chemicals that diffuse across the gap.
(D) Neural impulses travel across the gap in both directions.
(E) The calcium within the axons and dendrites of nerves adjacent to a synapse
acts as the neurotransmitter.
C</li>
</ol>
<p>3.When hydrogen ions are pumped out of the mitochondrial matrix, across the
inner mitochondrial membrane, and into the space between the inner and outer
membranes, the result is
(A) damage to the mitochondrion
(B) the reduction of NAD
(C) the restoration of the Na-K balance across the membrane
(D) the creation of a proton gradient
(E) the lowering of pH in the mitochondrial matrix
D </p>
<p>BTW I see what I did on the last question (number 3 from post #438). The Citric cycle requires ADP…not ATP. Apparently some oxidative phosphorylation goes on. Tricky CB! Bah >_<</p>
<p>^Vertigo has the correct answers.
Here are some review questions about biomes. </p>
<p>A) Deciduous forest
B) Tropical rain forest
C) Desert
D) Tundra
E) Taiga</p>
<ol>
<li><p>Long, cold, moist winters and short summers are typical of this biome dominated by gymnosperms.</p></li>
<li><p>A prolonged, relatively mild period with ample precipitation alternates with a cold period when plants become dormant.</p></li>
<li><p>This biome has the greatest diversity of species.</p></li>
<li><p>This biome is dominated by dwarf shrubs, grasses, and sedges that can tolerate long dark winters.</p></li>
</ol>
<p>How much do I need to know about structures of roots and stems? My review book is going on forever on this and it’s annoying to remember. I haven’t learned this in class :P</p>
<p>I can’t find the motivation to work anymore - ugh. I haven’t even covered biological diversity / taxonomy yet and it certainly doesn’t help how daunting it looks.</p>
<p>Does anyone know how important of a topic sensory and motor mechanisms are?</p>
<p>I’m pretty sure you can skip the Senses chapter in campbell…but you need to know the nervous system, and motor mechanisms…but more so muscle contraction…the mechanisms like flight, swimming, etc are pretty basic.
the first section in the Senses chapter about the different sensory receptors is kinda important though</p>
<p>We went over very rudimentary things like body plan, animal development, etc in class. But we didn’t cover protists/fungi - I have Campbell’s complicates everything.</p>
<p>I’m more concerned that it might show up as an FRQ.</p>