Chapter 8: An Introduction to Metabolism
Even though energy cannot be created or destroyed, the quality of energy decreases because some energy becomes this unusable form.
What is entropy?
This term describes the loss of electrons by a molecule, which subsequently makes that molecule more positive.
What is oxidation?
These specific microtubules do not attach to chromosomes but instead overlap and push against each other to elongate the cell
What are non-kinetochore microtubules?
These specific structures represent the points where non-sister chromatids have exchanged genetic material and remain physically connected.
What is chiasmata?
In the 1830s, this common condiment was sold as a medicinal cure for indigestion and diarrhea before it was used on food.
What is Ketchup?
An enzyme’s active site selectively binds its substrate due to precise structural compatibility, requiring alignment in these three key features to ensure specificity and proper catalysis.
What is complementary shape, size, and charge?
This is the specific location within the cell where the protein complexes of the ETC are found.
What is the inner mitochondrial membrane?
This is the most critical restriction point in the cell cycle; if a cell does not receive a go-ahead here, it will exit the cycle and enter the non-dividing G0 state.
What is G1 checkpoint?
During meiosis I, these structures separate from one another, while sister chromatids remain attached.
What are homologous chromosomes?
This is the only country in the world that has a national flag that is not rectangular or square; it consists of two stacked triangles.
What is Nepal?
During ATP-coupled reactions, energy from ATP hydrolysis is not transferred directly as free energy, but is instead temporarily stored by this specific chemical modification of the substrate at this stage of the reaction, increasing its reactivity.
What is phosphorylation of the intermediate?
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What is Phosphofructokinase (PFK) - ATP and Citrate (fructose-1-phosphate → fructose-1,6-bisphosphate)?
In the G2 phase, a cell will typically show peak concentrations of this specific protein to trigger the onset of mitosis?
What is M-cyclin?
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What is independent assortment?
In Norse mythology, this "mighty" son of Odin wields the hammer Mjölnir.
Who is Thor?
A reaction remains unfavorable even when coupled to ATP hydrolysis to ADP and Pi, but proceeds when ATP is instead cleaved to AMP and pyrophosphate, followed by further breakdown of pyrophosphate. This indicates that the initial coupling failed because this requirement for the overall reaction was not met.
What is the overall ΔG must be sufficiently negative?
FADH contributes fewer ATP molecules than NADH during oxidative phosphorylation, despite both carrying high-energy electrons. This difference arises because FADH2 donates its electrons at a later point in the electron transport chain, bypassing this key feature responsible for greater ATP yield.
What is because FADH2 deposits its electrons at Complex II, bypassing proton pumping at Complex I (leading to a reduced proton gradient)?
This specific internal signal occurs during the M phase checkpoint; it involves kinetochores that have not yet attached to spindle microtubules sending a molecular signal to delay this specific enzyme-driven event
What is the cleavage of cohesions (or the start of anaphase)?
If a germ cell undergoes a successful Meiosis I but then experiences nondisjunction of every sister chromatid pair during Anaphase II, calculate the probability that any resulting gamete will be a functional haploid (n).
What is 0%?
This TV show holds the record for the longest-running American scripted primetime television series.
What is The Simpsons?
A reaction releases energy overall, yet still requires an initial input of energy to proceed because reactant molecules must first be distorted to break existing bonds. This required input is specifically associated with this specific molecular process. (dont just say the term, but also describe the mechanism in which it works)
What is activation energy - contorting (distorting) reactant molecules to break bonds?
Following the deamination of these biomolecules, they can have their remaining carbon skeletons converted into intermediates such as pyruvate or acetyl-CoA, allowing them to enter cellular respiration.
What are amino acids (or proteins)?
While Cyclin-Dependent Kinase (CDK) levels are constant, this specific regulatory complex is formed only when cyclin concentrations reach a critical threshold, enabling the cell to phosphorylate proteins required for nuclear envelope and spindle formation.
What is MPF (Maturation-Promoting Factor)?
After crossing over in Prophase I, sister chromatids are no longer genetically identical. Despite this, they still segregate normally during Meiosis II. This demonstrates that chromatid separation is not determined by this factor, but instead by this structural feature.
What is not based on genetic content, but based on the attachment at the centromere/kinetochores?
Founded in 1870 as a women’s college, this institution was originally known by this name before becoming what is now Hunter College.
What is the Female Normal and High School?