MCAT Memory

Which pKa goes with which amino acid or functional group?

• 10.5

• Tyrosine

• 12 (12.5)

• Lysine

• 10

• Arginine

• 2

• Histidine

• 6

• Free Amino Acid Carboxyl

Which pKa goes with which amino acid or functional group?

• 8.5

• Carboxyl Terminus

• 6

• Histidine

• 9.5

• Amino Terminus

• 2

• Free Amino Acid Amino

• 3.5

• Free Amino Acid Carboxyl

Answer explanation

If it's not a free amino acid, then the amino and carboxyl terminus pKa will be LESS EXTREME.

Amino Terminus= 8.5 instead of 9.5

Carboxyl Terminus= 3.5 instead of 2

Which pKa goes with which amino acid or functional group?

• 8.2

• Free Amino Acid Amino

• 4.2

• Aspartate

• 12 (12.5)

• Arginine

• 9.5

• Cysteine

• 3.9

• Glutamate

Match the following line weaver Burke plots to their associated inhibition.

• Competitive

• 
• Noncompetitive

• 
• Mixed (Preference for E)

• 
• Uncompetitive

• 
• Noncompetitive

• 

Match the following Lineweaver Burke plots to their correct form of inhibition.

• Noncompetitive

• 
• Mixed (Preference for Enzyme)

• 
• Uncompetitive

• 
• Mixed (preference for ES complex)

• 
• Competitive

• 

Match the following

• with anticodon

• tRNA

• Antisense Strand

• DNA 5' - 3'

• Sense Strand

• DNA 3' - 5'

• with codon

• mRNA

After DNA transcription, the produced pre- ​ (a)   is modified with a poly-A tail [prevent degradation & export to cytoplasm and ribosome binding] and 5' cap [to protect & facilitate binding to ribosomes], and introns are spliced out by spliceosomes (which are produced by ​ (b)   ). mRNA is responsible for encoding the (c)   ​sequence. This translation occurs when ​ (d)   brings amino acids to ribosomes. ​ (e)   creates these ribosomes.

• Amino Acid
• mRNA
• tRNA
• rRNA
• snRNA
• ribosome

What are the purposes and characteristics of each type of structural and motor protein?

Groups:

(a) Collagen

,

(b) Elastin

,

(c) Keratin

,

(d) Actin

• STRETCH AND RECOIL

• Most of connective tissue in extra cellular matrix

• FLEXIBILITY

• MECHANICAL INTEGRITY

• Microfilaments, thin filaments, myofibrils

• Most abundant protein in Eukaryote cells

• Epithelial cells intermediate filament

• REGULATORY PROTEINS

• Glycine is every 3rd Amino Acid

• STRENGTH

• POLARITY FOR UNIDIRECTIONALITY FOR MOTOR PROTEINS

• Restore shape like a spring/elastic band

Match em up

Groups:

(a) Tubulin

,

(b) Kinesin

,

(c) Dynein

,

(d) Myosin

• Neck movement = power stroke

• Anaphase and Metaphase in Mitosis

• Microtubules are made of this

• Sliding movement in Flagella and Cilia

• Anterograde Cargo (to membrane and synapse)

• Structural Protein

• Primary motor protein with actin

• Vesicle transport to +++ end

• Vesicle transport to - - - end

• Thick filament in myofibril

• Retrograde Cargo (to soma and nucleus)

• Karyokinesis + Cytokinesis (AKA mitosis)

• Polar

Label the components of a muscle

a

b

c

d

Sarcolemma

Myocyte

Muscle

Myofibril

A Band

Sarcomere

Titin