Question 1

Based on the structure of its side chains,the amino acid shown below can be classified as

Accepted Answer

A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar. 
A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar.

Question 2

What is the sugar component in RNA called?

Accepted Answer

A) fructose 
B) galactose 
C) glucose 
D) ribose 
A) fructose 
B) galactose 
C) glucose 
D) ribose

Question 3

To which family does this organic compound belong?

Accepted Answer

A) amide 
B) amine 
C) carboxylic acid 
D) ester 
A) amide 
B) amine 
C) carboxylic acid 
D) ester

Question 4

Identify the amino acid shown below.

Accepted Answer

A) Arganine (Arg) 
B) Histidine (His) 
C) Lysine (Lys) 
D) Valine (Val) 
A) Arganine (Arg) 
B) Histidine (His) 
C) Lysine (Lys) 
D) Valine (Val)

Question 5

All of the fatty acids below contain eighteen carbons and range from saturated to three double bonds.Which has the highest melting point?

Accepted Answer

A) stearic acid (saturated) 
B) oleic acid (one double bond) 
C) linoleic acid (two double bonds) 
D) linolenic acid (three double bonds) 
A) stearic acid (saturated) 
B) oleic acid (one double bond) 
C) linoleic acid (two double bonds) 
D) linolenic acid (three double bonds)

Question 6

What is the molecular geometry around the carbon in (CH3)2C=CHC*   N indicated by the asterisk (*)?

Accepted Answer

A) linear 
B) trigonal planar 
C) trigonal pyramidal 
D) tetrahedral 
A) linear 
B) trigonal planar 
C) trigonal pyramidal 
D) tetrahedral

Question 7

Based on the structure of its side chains,the amino acid shown below can be classified as

Accepted Answer

A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar. 
A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar.

Question 8

Which name is not correct?

Accepted Answer

A) 1,1-dimethylcyclopentane 
B) 1,2-dimethylcyclopentane 
C) 1,3-dimethylcyclooctane 
D) 1,4-dimethylcyclopentane 
A) 1,1-dimethylcyclopentane 
B) 1,2-dimethylcyclopentane 
C) 1,3-dimethylcyclooctane 
D) 1,4-dimethylcyclopentane

Question 9

The C-Br bond in CH3CH2Li is a ________ (nonpolar,polar)covalent bond with a ________ (δ+,δ-)charge on the carbon atom and a ________ (δ+,δ-)charge on the lithium atom.

Accepted Answer

Question 10

Shown are ball-and-stick (1)and space-filling (2)models of ethylene.  
-What is the H-C-H bond angle?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180°

Question 11

The monosaccharide shown below is a(n)

Accepted Answer

A) aldohexose. 
B) aldopentose. 
C) ketohexose. 
D) ketopentose. 
A) aldohexose. 
B) aldopentose. 
C) ketohexose. 
D) ketopentose.

Question 12

What does the term "hydrophobic" mean?

Accepted Answer

A) water reactive 
B) water repelling 
C) water soluble 
D) none of these 
A) water reactive 
B) water repelling 
C) water soluble 
D) none of these

Question 13

Identify the following dipeptide.

Accepted Answer

A) Ser-Ala 
B) Ser-Leu 
C) Ser-Phe 
D) Ser-Val 
A) Ser-Ala 
B) Ser-Leu 
C) Ser-Phe 
D) Ser-Val

Question 14

Which name is not correct?

Accepted Answer

A) 2,2-dimethylbutane 
B) 2,3-dimethyloctane 
C) 2,6,6-trimethylheptane 
D) 2,3,3-trimethyloctane 
A) 2,2-dimethylbutane 
B) 2,3-dimethyloctane 
C) 2,6,6-trimethylheptane 
D) 2,3,3-trimethyloctane

Question 15

When butane,     ,reacts with oxygen to produce carbon dioxide and water,2880 kJ of heat are released per mole of methane.How many kJ of heat are released per gram of oxygen used?

Accepted Answer

A) 6.92 kJ/g 
B) 13.8 kJ/g 
C) 585 kJ/g 
D) 1170 kJ/g 
A) 6.92 kJ/g 
B) 13.8 kJ/g 
C) 585 kJ/g 
D) 1170 kJ/g

Question 16

Shown are ball-and-stick (1)and space-filling (2)models of acetylene.  
-What hybrid orbitals are used by carbon to form covalent bonds with hydrogen?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
A) sp 
B) sp2 
C) sp3 
D) sp3d

Question 17

Identify the compound that is an aldehyde.

Accepted Answer

A) ethyl pentanoate 
B) butanal 
C) dimethyl ether 
D) 3-pentanone 
A) ethyl pentanoate 
B) butanal 
C) dimethyl ether 
D) 3-pentanone

Question 18

The compound that does not contain oxygen is

Accepted Answer

A) aldehyde. 
B) ester. 
C) amide. 
D) aromatic. 
A) aldehyde. 
B) ester. 
C) amide. 
D) aromatic.

Question 19

What is the name for this alkyl group?

Accepted Answer

A) isobutyl 
B) tert-butyl 
C) tributyl 
D) trimethyl 
A) isobutyl 
B) tert-butyl 
C) tributyl 
D) trimethyl

Question 20

What does the term "alpha" amino acid mean?

Accepted Answer

A) The amino group attaches to the carbon in the carboxyl group. 
B) The amino group attaches to the carbon next to the carboxylic acid group. 
C) The amino acid contains only one carbon atom. 
D) The amino acid contains only one carboxylic acid group. 
A) The amino group attaches to the carbon in the carboxyl group. 
B) The amino group attaches to the carbon next to the carboxylic acid group. 
C) The amino acid contains only one carbon atom. 
D) The amino acid contains only one carboxylic acid group.

Exam 23: Connections to Organic and Biological Chemistry

Based on the structure of its side chains,the amino acid shown below can be classified as

What is the sugar component in RNA called?

To which family does this organic compound belong?

Identify the amino acid shown below.

All of the fatty acids below contain eighteen carbons and range from saturated to three double bonds.Which has the highest melting point?

What is the molecular geometry around the carbon in (CH3)2C=CHC* N indicated by the asterisk (*)?

Based on the structure of its side chains,the amino acid shown below can be classified as

Which name is not correct?

The C-Br bond in CH3CH2Li is a ________ (nonpolar,polar)covalent bond with a ________ (δ+,δ-)charge on the carbon atom and a ________ (δ+,δ-)charge on the lithium atom.

Shown are ball-and-stick (1)and space-filling (2)models of ethylene. -What is the H-C-H bond angle?

The monosaccharide shown below is a(n)

What does the term "hydrophobic" mean?

Identify the following dipeptide.

Which name is not correct?

When butane, ,reacts with oxygen to produce carbon dioxide and water,2880 kJ of heat are released per mole of methane.How many kJ of heat are released per gram of oxygen used?

Shown are ball-and-stick (1)and space-filling (2)models of acetylene. -What hybrid orbitals are used by carbon to form covalent bonds with hydrogen?

Identify the compound that is an aldehyde.

The compound that does not contain oxygen is

What is the name for this alkyl group?

What does the term "alpha" amino acid mean?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Filters

What is the molecular geometry around the carbon in (CH₃)₂C=CHC* N indicated by the asterisk (*)?

The C-Br bond in CH₃CH₂Li is a (nonpolar,polar)covalent bond with a (δ+,δ-)charge on the carbon atom and a (δ+,δ-)charge on the lithium atom.