Exam 1

Navigation » List of Schools » Northern Virginia Community College » Biology » Biology 101 – General Biology » Spring 2022 » Exam 1

Need help with your exam preparation?

Existing Quiz Clients Login here

Below are the questions for the exam with the choices of answers:

Try The Exam

Question #1

An example of dehydration reaction is _____.

A DNA and water reacting to form nucleotides

B a dipeptide and water reacting to form two amino acids

C starch and water reacting to form glucose molecules

D two glucose molecules reacting to form maltose and water

Question #2

Which molecules is not a carbohydrate?

A starch

B disaccharide

C polysaccharide

D fatty acids

Question #3

DNA is made of _____.

A fatty acids

B monosaccharides

C amino acids

D nucleotides

Question #4

The sequence GAACUU may be found in _____.

A both DNA and RNA

B RNA only

C neither DNA nor RNA

D DNA only

Question #5

Which statement about RNA is correct?

A RNA is made of amino acids.

B RNA contains thymine (T).

C RNA is double-stranded.

D RNA is single-stranded.

Question #6

One function of RNA molecules is to _____.

A copy themselves

B copy DNA

C carry messages from DNA to ribosomes

D pass genetic information to offspring

Question #7

The tertiary structure of a protein is the _____.

A order of amino acids

B α-helix and β-pleated sheet

C three-dimensional shape of the protein

D complex of multiple protein subunits (polypeptides)

Question #8

In a cellular protein, where would you expect to find a hydrophilic amino acid?

A on the outside of the protein, interacting with lipid molecules

B on the outside of the protein, interacting with water

C on the outside of a membrane protein, interacting with phospholipid fatty acid tails

D on the inside of the protein, away from water

Question #9

The α-helix and β-pleated sheet are examples of _____ protein structure.

A quaternary

B secondary

C primary

D tertiary

Question #10

How many peptide bonds are present in a protein that contains 45 amino acids?

A 44

B 45

C 46

D 90

Question #11

The secondary structure of a protein is the _____.

A three-dimensional shape of the protein

B complex of multiple protein subunits (polypeptides)

C order of amino acids

D α-helix or β-pleated sheet

Question #12

A β-pleated sheet is an example of _____ structure.

A quaternary

B primary

C tertiary

D secondary

Question #13

Collagen is a protein made of three polypeptides. This means that collagen has _____ structure.

A quaternary

B tertiary

C primary

D secondary

Question #14

Hydrocarbons have mostly _____, which makes them insoluble in water.

A polar covalent bonds

B hydrophilic functional groups

C nonpolar covalent bonds

D charged functional groups

Question #15

Saturated fats ______.

A are solid at room temperature

B are more common in plants than in animals

C have multiple double bonds in their fatty acids

D are liquid at room temperature

Question #16

Which molecule are hydrophobic?

A lipids

B nucleic acids

C proteins

D carbohydrates

Question #17

Lactose, a sugar in milk, is one glucose molecule bonded to one galactose molecule. Lactose is a(n) _____.

A monosaccharide

B starch

C polysaccharide

D disaccharide

Question #18

On foods packages, “fiber” refers to _____.

A proteins

B starch

C cellulose

D fats

Question #19

The structural polysaccharide, cellulose, is found in _____.

A plant cell walls

B animal cell membranes

C bacterial cell walls

D amyloplast, plant organelles that store carbohydrates

Question #20

Reactions that build polymers are an example of _____ reactions.

A breakdown

B monomer

C dehydration

D hydrolysis

Question #21

Which functional group in ATP is part of the process that releases energy for cells to use?

A methyl group

B amino group

C phosphate group

D hydroxyl group

Question #22

A carbon atom is most likely to form _____ with other atoms.

A hydrogen bonds

B no bonds

C ionic bonds

D covalent bonds

Question #23

A group of atoms, commonly found together in biological molecules, that participates in reactions is called _____.

A functional group

B polymer

C hydrocarbon

D isomer

Question #24

If the pH of a solution is increased from pH 5 to pH 7, this means the solution is ____ times more basic now.

A 100

B 2

C 1

D 10

Question #25

If the pH of a solution is decreased from pH 8 to pH 6, this means the solution is ____ times more acidic now.

A 100

B 2

C 1

D 10

Question #26

Will table salt (NaCl) dissolve more in methanol (a nonpolar substance ) or pure water?

A NaCl dissolves more in pure water

B NaCl dissolves more in methanol

Question #27

In a aqueous solution, a strong base like NaOH _____.

A acts as an acid

B decreases the pH

C is a strong buffer

D dissociates completely

Question #28

Too much atmospheric carbon dioxide damages coral reefs in the ocean. Which factor is a cause of this damage?

A increasing the amount of carbonate ions

B decreasing the H+ concentration

C decreasing the ocean temperature

D increasing the H+ ion concentration

Question #29

For water to evaporate, _____ must be broken.

A hydrogen bonds

B polar covalent bonds

C nonpolar covalent bonds

D ionic bonds

Question #30

Which bond or interaction is the strongest?

A hydrogen bond

B hydrophobic interaction

C van der Waals interaction

D covalent bond

Question #31

Two atoms that have the same mass number must have the same _____.

A number of protons + neutrons

B atomic number

C number of electrons

D protons

Question #32

Oxygen has an atomic number 8 and a mass number of 16. What is the atomic mass of oxygen

A approximately 16 grams

B approximately 16 amu (daltons)

C approximately 8 grams

D approximately 8 amu (daltons)

Question #33

The atomic number of sulfur is 16, which means that sulfur has _____.

A 16 protons and 16 neutrons

B 16 neutrons

C 8 protons and 8 neutrons

D 16 protons

Question #34

Which four elements make up approximately 96% of living matter

A carbon, hydrogen, nitrogen, oxygen

B oxygen, hydrogen, calcium, nitrogen

C carbon, oxygen, phosphorus, hydrogen

D carbon, sodium, hydrogen, nitrogen

Question #35

Which is NOT a characteristic of all living organisms?

A interaction with the environment

B use of DNA as the genetic material

C emergent properties

D ability to photosynthesize

Question #36

A control group is _____.

A matched with the experimental group except for one variable

B kept in an unchanging environment

C exposed to several variables

D left alone by the experiments

Question #37

Strong evidence for the common ancestry of all life comes from the fact that _____.

A decomposers include both bacteria and fungi

B there is a universal genetic code

C enzymes are used by all cells

D plants convert light energy to chemical energy

Question #38

The individuals in a species that are better able to survive and reproduce will pass more of their genes on to the next generation. This is called _____.

A natural selection

B a common ancestor

C gene flow

D beak selection

Question #39

All of the individuals if the same species living within a specified area are known as _____.

A family

B population

C community

D ecosystem

Question #40

All of the organisms inhabiting a particular ecosystem are known as _____.

A an organism

B a community

C a population

D a biosphere

Try The Exam

Fresh Grad Lands Job as Real Estate Agent With Help from Professional Writers

Need help with your exam preparation?

Below are the questions for the exam with the choices of answers:

Christian S.

Tyra

Linda

Manush

We accept payment