Question 1

The primary structure of a protein

Accepted Answer

A) is important for determining the secondary and tertiary structure of a protein. 
B) is simply the order of amino acids from one end of the protein to another. 
C) is important both genetically and structurally. 
D) is the linear sequence of amino acids that are linked together by peptide bonds. 
E) all of the above 
A) is important for determining the secondary and tertiary structure of a protein. 
B) is simply the order of amino acids from one end of the protein to another. 
C) is important both genetically and structurally. 
D) is the linear sequence of amino acids that are linked together by peptide bonds. 
E) all of the above

Question 2

Small RNA molecules that specifically bind complementary mRNA sequences and facilitate the destruction of the message by nucleases are

Accepted Answer

A) mRNAs. 
B) siRNAs. 
C) tRNAs. 
D) rRNAs. 
E) miRNAs. 
A) mRNAs. 
B) siRNAs. 
C) tRNAs. 
D) rRNAs. 
E) miRNAs.

Question 3

A ________,a ________,and a ________ are the major parts of a nucleotide,whereas a ________ and a ________ are the major parts of a nucleoside.

Accepted Answer

Phosphate group,suga

Question 4

Small RNA molecules (20-30 nucleotides in length)that have recently been found to have biological function include

Accepted Answer

A) microRNAs (miRN
A) . 
B) silencing RNAs (siRN
A) . 
C) messaging RNAs (mRN
A) . 
D) both choices A and C 
E) all of the above 
A) microRNAs (miRN
A) . 
B) silencing RNAs (siRN
A) . 
C) messaging RNAs (mRN
A) . 
D) both choices A and C 
E) all of the above

Question 5

How would you utilize silencing and microRNAs in a gene therapy treatment for a single-gene genetic disorder?

Accepted Answer

Although answers will vary,all

Question 6

The chemical nature of each amino acid is determined by which of the following groups?

Accepted Answer

A) amino 
B) carboxyl 
C) hydroxil 
D) R 
E) hydrogen 
A) amino 
B) carboxyl 
C) hydroxil 
D) R 
E) hydrogen

Question 7

________ and ________ are the scientists responsible for the concept of the DNA double helix.

Accepted Answer

James Wats

Question 8

The ________ projection illustrates saccharides as linear,whereas the ________ projection suggests the spatial relationships of saccharides.

Accepted Answer

The answer of The ________ projection illustrates saccharides as linear,whereas...

Question 9

________ fatty acids are liquid at room temperature,while ________ fatty acids are solid.

Accepted Answer

Unsaturate

Question 10

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained? How will this influence other levels of protein structure?

Accepted Answer

The exclusion of hydrophobic g

Question 11

The amino acid referred to as the "helix breaker" (because it lacks the hydrogen atom needed for hydrogen bonding)is

Accepted Answer

A) leucine. 
B) proline. 
C) methionine. 
D) valine. 
E) phenylalanine. 
A) leucine. 
B) proline. 
C) methionine. 
D) valine. 
E) phenylalanine.

Question 12

Which of the following three-letter symbols represents an amino acid that is polar and uncharged?

Accepted Answer

A) pro 
B) gln 
C) ala 
D) asp 
E) his 
A) pro 
B) gln 
C) ala 
D) asp 
E) his

Question 13

________ RNA is a component of the ribosomes that serve as the site of protein synthesis.

Accepted Answer

The answer of ________ RNA is a component of the...

Question 14

Match between columns
                        Premises: asparagine
lysine
aspartate
tyrosine
tryptophan
glutamate
arginine
threonine

Accepted Answer

The Answer of E and R and W and N is...

Question 15

To which of the following classes of sugars does glucose belong?

Accepted Answer

A) pentose 
B) hexose 
C) tetrose 
D) heptose 
E) triose 
A) pentose 
B) hexose 
C) tetrose 
D) heptose 
E) triose

Question 16

Based on the following amino acid sequence,which region(s)is/are hydrophobic?
1[K-K-N-Q] - 2[A-G-G-V] - 3[Y-C-S-R] - 4[H-E-C-Y]

Accepted Answer

A) region 1 
B) region 2 
C) region 3 
D) region 4 
E) both regions 1 and 3 
A) region 1 
B) region 2 
C) region 3 
D) region 4 
E) both regions 1 and 3

Question 17

A transmembrane protein has 1000 amino acids.The fifth amino acid is found on the external surface of the cell membrane.It interacts with the aqueous environment outside the cell.Amino acids 25 and 205 are covalently bonded to each other and are required to give the protein its three-dimensional shape.Amino acid 554 is found on the outer surface of the protein,but it is deep in the interior of the membrane.Amino acid 979 is found on the external surface of the protein,where it forms a weak ionic bond with a chloride ion.Can you identify each of the numbered amino acids by structural group and name? Please note that there may be more than one specific amino acid in some cases.
Amino acids:
5
25
205
554
979

Accepted Answer

5: polar,charged or uncharged (hydrophil

Question 18

The term amphipathic describes the characteristic of some molecules that have ________.

Accepted Answer

A) two polar regions 
B) only a single polar region 
C) both a polar and a nonpolar region 
D) no polar regions 
E) two nonpolar regions 
A) two polar regions 
B) only a single polar region 
C) both a polar and a nonpolar region 
D) no polar regions 
E) two nonpolar regions

Question 19

Which of the following is not a steroid?

Accepted Answer

A) testosterone 
B) estradiol 
C) cortisol 
D) aldosterone 
E) epinephrine 
A) testosterone 
B) estradiol 
C) cortisol 
D) aldosterone 
E) epinephrine

Question 20

Which of the following statements is not true of the amino acids?

Accepted Answer

A) There are more than 60 different kinds of amino acids present in cells. 
B) The R group of amino acids differs from one amino acid to another. 
C) Only around 20 amino acids are used in protein synthesis. 
D) All amino acids exist in two stereoisomeric forms. 
E) Amino acids have an N-terminus, C-terminus, and R groups. 
A) There are more than 60 different kinds of amino acids present in cells. 
B) The R group of amino acids differs from one amino acid to another. 
C) Only around 20 amino acids are used in protein synthesis. 
D) All amino acids exist in two stereoisomeric forms. 
E) Amino acids have an N-terminus, C-terminus, and R groups.

Exam 3: The Macromolecules of the Cell

The primary structure of a protein

Small RNA molecules that specifically bind complementary mRNA sequences and facilitate the destruction of the message by nucleases are

A ________,a ________,and a ________ are the major parts of a nucleotide,whereas a ________ and a ________ are the major parts of a nucleoside.

Small RNA molecules (20-30 nucleotides in length)that have recently been found to have biological function include

How would you utilize silencing and microRNAs in a gene therapy treatment for a single-gene genetic disorder?

The chemical nature of each amino acid is determined by which of the following groups?

________ and ________ are the scientists responsible for the concept of the DNA double helix.

The ________ projection illustrates saccharides as linear,whereas the ________ projection suggests the spatial relationships of saccharides.

________ fatty acids are liquid at room temperature,while ________ fatty acids are solid.

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained? How will this influence other levels of protein structure?

The amino acid referred to as the "helix breaker" (because it lacks the hydrogen atom needed for hydrogen bonding)is

Which of the following three-letter symbols represents an amino acid that is polar and uncharged?

________ RNA is a component of the ribosomes that serve as the site of protein synthesis.

To which of the following classes of sugars does glucose belong?

Based on the following amino acid sequence,which region(s)is/are hydrophobic? 1[K-K-N-Q] - 2[A-G-G-V] - 3[Y-C-S-R] - 4[H-E-C-Y]

The term amphipathic describes the characteristic of some molecules that have ________.

Which of the following is not a steroid?

Which of the following statements is not true of the amino acids?

A Preview of the Cell

The Chemistry of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters

A ,a ,and a are the major parts of a nucleotide,whereas a and a are the major parts of a nucleoside.

and are the scientists responsible for the concept of the DNA double helix.

The projection illustrates saccharides as linear,whereas the projection suggests the spatial relationships of saccharides.

fatty acids are liquid at room temperature,while fatty acids are solid.