Question 1

In the lock-and-key model of enzyme action,the enzyme active site is thought of as ________.

Accepted Answer

A) a rigid,nonflexible shape that fits the substrate exactly 
B) an area of the enzyme that can adjust to fit the substrate shape 
C) a key-like shape that fits into a pocket of the substrate surface 
D) a hydrophilic area on the enzyme surface 
E) a lock that bars a noncompetitive inhibitor from reacting 
A) a rigid,nonflexible shape that fits the substrate exactly 
B) an area of the enzyme that can adjust to fit the substrate shape 
C) a key-like shape that fits into a pocket of the substrate surface 
D) a hydrophilic area on the enzyme surface 
E) a lock that bars a noncompetitive inhibitor from reacting

Question 2

In sickle-cell anemia,the hemoglobin molecules ________.

Accepted Answer

A) come apart into separate chains 
B) enlarge to twice normal size 
C) clump together into insoluble fibers 
D) dissolve in the plasma 
E) undergo crenation 
A) come apart into separate chains 
B) enlarge to twice normal size 
C) clump together into insoluble fibers 
D) dissolve in the plasma 
E) undergo crenation

Question 3

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

Accepted Answer

A) wheat and rice 
B) rice and beans 
C) almonds and walnuts 
D) corn and beans 
E) wheat and corn 
A) wheat and rice 
B) rice and beans 
C) almonds and walnuts 
D) corn and beans 
E) wheat and corn

Question 4

At a pH < 5,the ionized form for alanine (pI = 6)will have ________.

Accepted Answer

A) a net positive charge 
B) a net negative charge 
C) an overall charge of zero 
D) low solubility in water 
E) a negative charge on the carboxyl group 
A) a net positive charge 
B) a net negative charge 
C) an overall charge of zero 
D) low solubility in water 
E) a negative charge on the carboxyl group

Question 5

In an enzyme,the polypeptide chain folds into a compact shape known as the ________ structure.

Accepted Answer

A) pleated 
B) primary 
C) secondary 
D) tertiary 
E) quaternary 
A) pleated 
B) primary 
C) secondary 
D) tertiary 
E) quaternary

Question 6

Glycine is the only naturally occurring amino acid that is ________.

Accepted Answer

A) negatively charged 
B) positively charged 
C) neutral 
D) in the L- form 
E) achiral 
A) negatively charged 
B) positively charged 
C) neutral 
D) in the L- form 
E) achiral

Question 7

Amino acids that are not synthesized in the body but must be ingested with the diet are called ________ amino acids.

Accepted Answer

The answer of Amino acids that are not synthesized in...

Question 8

The side chain for histidine is classified as a ________ side chain.

Accepted Answer

A) basic 
B) neutral 
C) acidic 
D) nonpolar 
E) polar 
A) basic 
B) neutral 
C) acidic 
D) nonpolar 
E) polar

Question 9

Match between columns
                        Premises: The inhibitor does not resemble the substrate.
Adding more substrate does not reverse the effect of this inhibitor.
an inhibitor that resembles the structure of the substrate
The inhibition can be reversed by increasing the concentration of substrate.

Accepted Answer

The Answer of competitive and noncompetitive is...

Question 10

The isoelectric point for any amino acid is the pH at which the amino acid has a net charge of ________.

Accepted Answer

The answer of The isoelectric point for any amino acid...

Question 11

The hydrolysis of ester bonds in triacylglycerols is catalyzed by a ________.

Accepted Answer

A) lipase 
B) lyase 
C) isomerase 
D) peptidase 
E) oxidoreductase 
A) lipase 
B) lyase 
C) isomerase 
D) peptidase 
E) oxidoreductase

Question 12

Match between columns
                        Premises: 11ec7e73_0967_d02d_b1d2_7f1db632416d_TB6077_11
11ec7e73_1e5f_3eae_b1d2_97838a50e2ad_TB6077_11
11ea71d0_de88_446e_91e5_dfe15e0e5718_TB6077_11
11ea71d0_de88_6b84_91e5_6fb300a27ecd_TB6077_11
11ec7e73_765a_e561_b1d2_61424b78dabf_TB6077_11
11ec7e73_612c_6150_b1d2_ff24ee2e428d_TB6077_11
11ec7e73_3896_367f_b1d2_05aa38407dfa_TB6077_11
11ea71d0_de88_6b83_91e5_3f3bdcaea73a_TB6077_11
11ec7e72_f20d_445c_b1d2_d79e5128c460_TB6077_11

Accepted Answer

The Answer of both and hydrophobic and hydrophilic is...

Question 13

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

Accepted Answer

A) uses less substrate 
B) produces different products 
C) occurs at a faster rate 
D) requires more energy 
E) requires a higher temperature 
A) uses less substrate 
B) produces different products 
C) occurs at a faster rate 
D) requires more energy 
E) requires a higher temperature

Question 14

"Physiologic conditions" for reactions within the body are approximately ________.

Accepted Answer

A) pH 3 and 37 °C 
B) pH 7 and 37 °C 
C) pH 7 and 37 °F 
D) pH 8 and 273 °C 
E) pH 7 and 273 K 
A) pH 3 and 37 °C 
B) pH 7 and 37 °C 
C) pH 7 and 37 °F 
D) pH 8 and 273 °C 
E) pH 7 and 273 K

Question 15

In the peptide STFNA,the N-terminal amino acid is ________.

Accepted Answer

A) alanine 
B) phenylalanine 
C) tryptophan 
D) aspartic acid 
E) serine 
A) alanine 
B) phenylalanine 
C) tryptophan 
D) aspartic acid 
E) serine

Question 16

In the peptide Ala-Try-Gly-Phe,the N-terminal amino acid is ________.

Accepted Answer

A) alanine 
B) phenylalanine 
C) tryptophan 
D) aspartic acid 
E) glycine 
A) alanine 
B) phenylalanine 
C) tryptophan 
D) aspartic acid 
E) glycine

Question 17

The structural level represented by the presence of four units in hemoglobin is ________.

Accepted Answer

The answer of The structural level represented by the presence...

Question 18

Match between columns
                        Premises: pleated sheet
the combination of two or more protein molecules to form an active protein
The protein folds into a compact structure stabilized by interactions between R groups.
the structural level achieved when hydrogen bonds form between the carboxyl group of one amino acid and the amino group of a different amino acid
the sequence of amino acids

Accepted Answer

The Answer of tertiary and quaternary and secondary structure and is...

Question 19

The full name of the enzyme LDH is ________.

Accepted Answer

A) lactate dehydrogenase 
B) liver decompensation hexase 
C) lactate dehydrase 
D) liver dihydrogen kinase 
E) lipase dehydrogenase 
A) lactate dehydrogenase 
B) liver decompensation hexase 
C) lactate dehydrase 
D) liver dihydrogen kinase 
E) lipase dehydrogenase

Question 20

In the peptide Ser-Cys-Ala-Gly,the C-terminal end is ________.

Accepted Answer

A) serine 
B) serotonin 
C) glycine 
D) glycerine 
E) alanine 
A) serine 
B) serotonin 
C) glycine 
D) glycerine 
E) alanine

In the lock-and-key model of enzyme action,the enzyme active site is thought of as ________.

In sickle-cell anemia,the hemoglobin molecules ________.

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

At a pH < 5,the ionized form for alanine (pI = 6)will have ________.

In an enzyme,the polypeptide chain folds into a compact shape known as the ________ structure.

Glycine is the only naturally occurring amino acid that is ________.

Amino acids that are not synthesized in the body but must be ingested with the diet are called ________ amino acids.

The side chain for histidine is classified as a ________ side chain.

The isoelectric point for any amino acid is the pH at which the amino acid has a net charge of ________.

The hydrolysis of ester bonds in triacylglycerols is catalyzed by a ________.

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

"Physiologic conditions" for reactions within the body are approximately ________.

In the peptide STFNA,the N-terminal amino acid is ________.

In the peptide Ala-Try-Gly-Phe,the N-terminal amino acid is ________.

The structural level represented by the presence of four units in hemoglobin is ________.

The full name of the enzyme LDH is ________.

In the peptide Ser-Cys-Ala-Gly,the C-terminal end is ________.

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Exam 16: Amino Acids, Proteins, and Enzymes

In the lock-and-key model of enzyme action,the enzyme active site is thought of as ________.

In sickle-cell anemia,the hemoglobin molecules ________.

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

At a pH < 5,the ionized form for alanine (pI = 6)will have ________.

In an enzyme,the polypeptide chain folds into a compact shape known as the ________ structure.

Glycine is the only naturally occurring amino acid that is ________.

Amino acids that are not synthesized in the body but must be ingested with the diet are called ________ amino acids.

The side chain for histidine is classified as a ________ side chain.

The isoelectric point for any amino acid is the pH at which the amino acid has a net charge of ________.

The hydrolysis of ester bonds in triacylglycerols is catalyzed by a ________.

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

"Physiologic conditions" for reactions within the body are approximately ________.

In the peptide STFNA,the N-terminal amino acid is ________.

In the peptide Ala-Try-Gly-Phe,the N-terminal amino acid is ________.

The structural level represented by the presence of four units in hemoglobin is ________.

The full name of the enzyme LDH is ________.

In the peptide Ser-Cys-Ala-Gly,the C-terminal end is ________.

Chemistry in Our Lives

Chemistry and Measurement

Matter and Energy

Atoms and Elements

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Quantities and Reactions

Gases

Solutions

Acids and Bases and Equilibrium

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Thiols, Ethers, Aldehydes, and Ketones

Carbohydrates

Carboxylic Acids, Esters, Amines, and Amides

Lipids

Nucleic Acids and Protein Synthesis

Metabolic Pathways and Energy Production

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