Question 1

Why did the lactose tolerance mutation in the East African herders spread so rapidly within the population?

Accepted Answer

A) Milk was a good source of protein during the winter. 
B) It was a selective advantage for survival during droughts. 
C) Lactose was a better source of energy than glucose. 
D) Milk provided calcium for strong bones. 
A) Milk was a good source of protein during the winter. 
B) It was a selective advantage for survival during droughts. 
C) Lactose was a better source of energy than glucose. 
D) Milk provided calcium for strong bones. B

Question 2

Which of the following statements about hydrocarbons is false?

Accepted Answer

A) Hydrocarbons can form straight,branched or ringed structures. 
B) Hydrocarbons contain only carbon and hydrogen atoms. 
C) Hydrocarbons consist of atoms linked by single and double bonds. 
D) Hydrocarbons are inorganic compounds. 
A) Hydrocarbons can form straight,branched or ringed structures. 
B) Hydrocarbons contain only carbon and hydrogen atoms. 
C) Hydrocarbons consist of atoms linked by single and double bonds. 
D) Hydrocarbons are inorganic compounds. D

Question 3

Proteins cannot be denatured by

Accepted Answer

A) changes in salt concentration. 
B) freezing. 
C) changes in pH. 
D) heat. 
A) changes in salt concentration. 
B) freezing. 
C) changes in pH. 
D) heat. B

Question 4

Which of the following functional groups is capable of regulating gene expression?

Accepted Answer

A) -CO 
B) -CH3 
C) -OH 
D) -COOH 
A) -CO 
B) -CH3 
C) -OH 
D) -COOH

Question 5

Which of the following statements about enzymes is false?

Accepted Answer

A) They function as chemical catalysts. 
B) They regulate virtually all chemical reactions in a cell. 
C) They are monomers used to build proteins. 
D) They increase the rate of chemical reactions. 
A) They function as chemical catalysts. 
B) They regulate virtually all chemical reactions in a cell. 
C) They are monomers used to build proteins. 
D) They increase the rate of chemical reactions.

Question 6

Which of the following statements about anabolic steroids is false?

Accepted Answer

A) They can stimulate mood swings and violent behavior. 
B) They promote bone growth. 
C) They often cause the body to reduce its normal output of sex hormones. 
D) They cause a general buildup of muscle mass. 
A) They can stimulate mood swings and violent behavior. 
B) They promote bone growth. 
C) They often cause the body to reduce its normal output of sex hormones. 
D) They cause a general buildup of muscle mass.

Question 7

Which of the following options correctly pairs a polymer and its monomer?

Accepted Answer

A) RNA,ribose 
B) collagen,nucleic acids 
C) DNA,nucleotides 
D) cellulose,amino acids 
A) RNA,ribose 
B) collagen,nucleic acids 
C) DNA,nucleotides 
D) cellulose,amino acids

Question 8

Which of the following organisms contain the polysaccharide chitin?

Accepted Answer

A) animals and plants 
B) plants and bacteria 
C) insects and plants 
D) fungi and insects 
A) animals and plants 
B) plants and bacteria 
C) insects and plants 
D) fungi and insects

Question 9

A diet high in animal products and hydrogenated vegetable margarine may increase the risk for atherosclerosis.This is because

Accepted Answer

A) most animal fats are used for energy storage and most hydrogenated vegetable margarines contain high levels of unsaturated fats. 
B) most animal fats are saturated and many hydrogenated vegetable margarines contain high levels of trans fats. 
C) most animal fats are unsaturated and most hydrogenated vegetable margarines contain high levels of steroids. 
D) most hydrogenated vegetable margarines are hydrogenated oils and most animal products contain high levels of phospholipids. 
A) most animal fats are used for energy storage and most hydrogenated vegetable margarines contain high levels of unsaturated fats. 
B) most animal fats are saturated and many hydrogenated vegetable margarines contain high levels of trans fats. 
C) most animal fats are unsaturated and most hydrogenated vegetable margarines contain high levels of steroids. 
D) most hydrogenated vegetable margarines are hydrogenated oils and most animal products contain high levels of phospholipids.

Question 10

Glucose molecules are to starch as are to proteins.

Accepted Answer

A) monosaccharides 
B) amino acids 
C) oils 
D) fatty acids 
A) monosaccharides 
B) amino acids 
C) oils 
D) fatty acids

Question 11

A disaccharide forms when

Accepted Answer

A) two starches join by dehydration synthesis. 
B) two starches join by hydrolysis. 
C) two monosaccharides join by dehydration synthesis. 
D) two monosaccharides join by hydrolysis. 
A) two starches join by dehydration synthesis. 
B) two starches join by hydrolysis. 
C) two monosaccharides join by dehydration synthesis. 
D) two monosaccharides join by hydrolysis.

Question 12

High- fructose corn syrup is made from corn.The main carbohydrate in corn is a polysaccharide called

Accepted Answer

A) starch. 
B) fructose. 
C) hydrocarbon. 
D) cellulose. 
A) starch. 
B) fructose. 
C) hydrocarbon. 
D) cellulose.

Question 13

Many names for sugars end in the suffix

Accepted Answer

A) - hyde. 
B) - ase. 
C) - ose. 
D) - acid. 
A) - hyde. 
B) - ase. 
C) - ose. 
D) - acid.

Question 14

Which one of the following would be correctly classified as a protein?

Accepted Answer

A) enzymes 
B) cholesterol 
C) starch 
D) cellulose 
A) enzymes 
B) cholesterol 
C) starch 
D) cellulose

Question 15

Which of the following substances is a lipid?

Accepted Answer

A) cellulose 
B) steroids 
C) enzymes 
D) DNA 
A) cellulose 
B) steroids 
C) enzymes 
D) DNA

Question 16

A molecule with the formula C55H110O55 is probably a(n)

Accepted Answer

A) steroid. 
B) oil. 
C) polysaccharide. 
D) protein. 
A) steroid. 
B) oil. 
C) polysaccharide. 
D) protein.

Question 17

These two molecules are structural isomers.What is the difference between them?

Accepted Answer

A) Only one of them has a double bond between carbon atoms. 
B) the number of carbon atoms 
C) the location of a double- bonded oxygen atom 
D) the number of hydrogen atoms 
A) Only one of them has a double bond between carbon atoms. 
B) the number of carbon atoms 
C) the location of a double- bonded oxygen atom 
D) the number of hydrogen atoms

Question 18

Which of the following characteristics of protein will remain intact if the protein is denatured?

Accepted Answer

A) the binding properties of the protein 
B) the shape of the protein 
C) the function of the protein 
D) the number of amino acids in the protein 
A) the binding properties of the protein 
B) the shape of the protein 
C) the function of the protein 
D) the number of amino acids in the protein

Question 19

Which of the following is a carboxyl group?

Accepted Answer

A) -OH 
B) -C=O 
C) -NH2 
D) -COOH 
A) -OH 
B) -C=O 
C) -NH2 
D) -COOH

Question 20

Which of the following statements about the monomers and polymers found in living organisms is false?

Accepted Answer

A) Monomers serve as building blocks for polymers. 
B) The monomers used to make polymers are essentially universal. 
C) Monomers are joined together by the process of hydrolysis. 
D) Cells typically make all of their macromolecules from a set of 40-50 common monomers and a few other ingredients that are rare. 
A) Monomers serve as building blocks for polymers. 
B) The monomers used to make polymers are essentially universal. 
C) Monomers are joined together by the process of hydrolysis. 
D) Cells typically make all of their macromolecules from a set of 40-50 common monomers and a few other ingredients that are rare.

Exam 3: The Molecules of Cells

Why did the lactose tolerance mutation in the East African herders spread so rapidly within the population?

Which of the following statements about hydrocarbons is false?

Proteins cannot be denatured by

Which of the following functional groups is capable of regulating gene expression?

Which of the following statements about enzymes is false?

Which of the following statements about anabolic steroids is false?

Which of the following options correctly pairs a polymer and its monomer?

Which of the following organisms contain the polysaccharide chitin?

A diet high in animal products and hydrogenated vegetable margarine may increase the risk for atherosclerosis.This is because

Glucose molecules are to starch as are to proteins.

A disaccharide forms when

High- fructose corn syrup is made from corn.The main carbohydrate in corn is a polysaccharide called

Many names for sugars end in the suffix

Which one of the following would be correctly classified as a protein?

Which of the following substances is a lipid?

A molecule with the formula C55H110O55 is probably a(n)

These two molecules are structural isomers.What is the difference between them?

Which of the following characteristics of protein will remain intact if the protein is denatured?

Which of the following is a carboxyl group?

Which of the following statements about the monomers and polymers found in living organisms is false?

Biology: Exploring Life

The Chemical Basis of Life

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

Photosynthesis: Using Light to Make Food

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

Dna Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure,growth,and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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