Exam 1 Flashcards
Which type of tissue is the least dense (has the fewest cells)?
connective tissue
Homeostasis is the body’s ability to maintain a ___ internal environment
stable
In a positive feedback mechanism, the input and output are ___
the same
Sweating when you get hot is an example of a __ feedback mechanism
negative
Which type of gland utilizes a duct?
exocrine
Insulin and glucagon are examples of ___
antagonistic effectors
Which part of a feedback mechanism is responsible for detecting the initial change?
sensor
Adipose tissue (fat) is an example of what tissue type?
connective
Which type of feedback system moves conditions further from the set point?
positive
Which type of bond involves equal sharing of electrons?
nonpolar
Which atom is most likely to become an anion?
chlorine (7 valence electrons)
Within the water molecule, which atom carries a partial negative charge?
oxygen
The bond within a single water molecule is an example of a ___ bond
polar covalent
The bond b/w SEPARATE water molecules is an example of a ___ bond
hydrogen
Is glycogen polar or nonpolar?
polar
Which type of fact will have only C-H bonds?
saturated
Which of these codons codes for an amino acid?
AUG
Where are anti-codons found?
in tRNA
Which site on the ribosome will receive the tRNA with the next amino acid to be added?
A site
Which level of protein structure refers to the overall 3D shape of a protein?
tertiary
An mRNA composed of 24 codons will code for a protein composed of ___ amino acids (remember the STOP codon)
23
What percentage of our DNA actually codes for proteins?
1.5%
Affinity b/w an enzyme and a substrate will have an effect at __ substrate concentrations
low
A reaction in which products have less energy than reactants is an ___ reaction
exergonic
Where does glycolysis take place?
cytoplasm
Which is the only stage of cellular respiration that does NOT produce ATP directly?
linking step
How many ATPs are made from 2 turns of the Kreb Cycle?
2
What percentage of the total ATP produced is made during the first 3 stages of cellular respiration?
10%
What is the purpose of lactic acid fermentation?
produce NAD+
Movement of H+ into the ___ requires energy
intermembrane space
