Georgia Military College BIO 123 Exam 1. 40 Questions and Answers.

/ ► Exam 1 Question 1 Question text 4

The type of bond between one hydrogen atom and one oxygen atom in a water molecule is _______.

Select one: a. a polar covalent bond

b. an ionic bond

c. hydrogen bond

d. a nonpolar covalent bond

e. a hydrophobic interaction

Feedback The correct answer is: a polar covalent bond Question 2 Incorrect Mark 0.00 out of 1.00 0

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Question text 3

What are the six elements that make up living organisms?

Select one: a. carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur

b. copper, iron, magnesium, sodium, water, zinc

c. carbon dioxide, hydrogen, nitrogen, oxygen, phosphate, sulfate

d. calcium, hydrogen, iron, potassium, sulfur, water

e. aluminum, magnesium, nitrogen, silicon, sodium, sulfur

Feedback The correct answer is: carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur Question 3 Correct Mark 1.00 out of 1.00 0

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3

Why does the molecule shown make plaques along the walls of blood vessels?

Select one: a. it is hydrophillic and can trap dust

b. it is hydrophobic and would not dissolve in blood fluid

c. it is hydrophobic and can repel insects

d. it is hydrophillic and likes to stick to blood fluid

e. it is hydrophobic and serves as a waterproof barrier

Feedback The correct answer is: it is hydrophobic and would not dissolve in blood fluid Question 4 Incorrect Mark 0.00 out of 1.00

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Question text 3

What organelle begins the breakdown of long chain fatty acids, before final breakdown in the mitochondria?

Select one: a. rough endoplasmic reticulum

b. mitochondria

c. smooth endoplasmic reticulum

d. lysosomes

e. peroxisomes

Feedback The correct answer is: peroxisomes Question 5 Correct Mark 1.00 out of 1.00

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Question text 3

You are trying to determine what an unknown solution is. After mixing with water, you determine that the two liquids do not mix and stay separate. Based on this observation, what conclusion can you make?

Select one: a. The unknown solution is adhesive

b. The unknown solution is covalent

c. The unknown solution is ionic

d. The unknown solution is hydrophilic

e. The unknown solution is hydrophobic

Feedback The correct answer is: The unknown solution is hydrophobic Question 6 Incorrect Mark 0.00 out of 1.00

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Question text 3

What type of reaction removes a hydroxyl group and a hydrogen atom from two molecules to join them together?

Select one: a. a dehydration reaction

b. a hydrophilic reaction

c. a monomer reaction

d. a polymer reaction

e. a hydrolysis reaction

Feedback The correct answer is: a dehydration reaction Question 7 Correct Mark 1.00 out of 1.00

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Question text 3

Which structure can occupy up to 90% of the volume in a plant cell?

Select one: a. central vacuole

b. endoplasmic reticulum

c. nucleus

d. chloroplasts

e. cytoplasm

Feedback The correct answer is: central vacuole Question 8 Correct Mark 1.00 out of 1.00

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Question text 4

What kingdom is characterized by eukaryotic, multicellular organisms that ingest their food?

Select one: a. Fungi

b. Plants

c. Protists

d. Animals

e. Archaea

Feedback The correct answer is: Animals Question 9 Correct Mark 1.00 out of 1.00

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Question text 4

What type of bond occurs between positively and negatively charged atoms?

Select one: a. covalent bond

b. adhesive interaction

c. hydrogen bond

d. ionic bond

e. hydrophobic interaction

Feedback The correct answer is: ionic bond Question 10 Correct Mark 1.00 out of 1.00

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Question text 3

Which organelle is physically connected to the nuclear envelope?

Select one: a. Golgi apparatus

b. mitochondria

c. endoplasmic reticulum

d. nucleolus

e. lysosome

Feedback The correct answer is: endoplasmic reticulum Question 11 Correct Mark 1.00 out of 1.00

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Question text 4

What level of protein structure is associated with alpha helix and pleated sheet?

Select one: a. primary

b. secondary

c. quaternary

d. tertiary

e. dipeptide

Feedback The correct answer is: secondary Question 12 Correct Mark 1.00 out of 1.00

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Question text 3

What is the basic unit of structure and function for all life?

Select one: a. atom

b. molecule

c. cell

d. organ

e. organism

Feedback The correct answer is: cell Question 13 Correct Mark 1.00 out of 1.00

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Question text 3

Ions located in bones and teeth that are also important in muscle contractions and nerve conduction are ________.

Select one: a. sodium

b. chloride

c. bicarbonate

d. potassium

e. calcium

Feedback The correct answer is: calcium Question 14 Correct Mark 1.00 out of 1.00

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Question text 3

What is hydrochloric acid classified as an acid?

Select one: a. it absorbs excess hydroxide ions from the solution

b. it dissociates to release hydroxide ions

c. it dissociates to release hydrogen ions and absorbs excess hydroxide ions from the solution

d. it absorbs excess hydrogen ions from the solution

e. it dissociates to release hydrogen ions

Feedback The correct answer is: it dissociates to release hydrogen ions and absorbs excess hydroxide ions from the solution Question 15 Incorrect Mark 0.00 out of 1.00

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Question text 4

What is the most significant function of the Golgi apparatus?

Select one: a. secreting proteins

b. transporting proteins

c. packaging proteins

d. synthesizing proteins

e. lipid synthesis

Feedback The correct answer is: lipid synthesis Question 16 Incorrect Mark 0.00 out of 1.00

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Question text 3

Where are lipids synthesized outside of the endomembrane system?

Select one: a. smooth endoplasmic reticulum

b. rough endoplasmic reticulum

c. Golgi apparatus

d. nucleus

e. mitochondria

Feedback The correct answer is: mitochondria Question 17 Incorrect Mark 0.00 out of 1.00

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Question text 4

What structure allows for sperm mobility in mammals?

Select one: a. pseudopod

b. cilium

c. actin filament

d. intermediate filament

e. flagellum

Feedback The correct answer is: flagellum Question 18 Correct Mark 1.00 out of 1.00

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Question text 3

How many electrons are in the valence shell of the phosphorus atom above?

Select one: a. 2

b. 4

c. 5

d. 6

e. 8

Feedback The correct answer is: 5

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Question text 4

What would be the result of a cell that did not have RNA molecules?

Select one: a. The DNA would take over its job

b. The cell would not have genes

c. There would be no effect on the cell

d. The cell could not make energy

e. The cell would not be able to make proteins

Feedback The correct answer is: The cell would not be able to make proteins Question 20 Correct

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Question text 4

What is the term for a specific combination of bonded atoms which always react in the same way?

Select one: a. a hydrophilic group

b. a hydrophobic group

c. an organic group

d. a functional group

e. a covalent group

Feedback The correct answer is: a functional group Question 21 Incorrect Mark 0.00 out of 1.00

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Question text 4

How do amino acids differ from one another?

Select one: a. amino group

b. carbonyl group

c. phosphorous content

d. calcium content

e. R group

Feedback The correct answer is: R group Question 22 Correct Mark 1.00 out of 1.00

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Question text 3

The four rings in the molecule above contain only carbon and hydrogen atoms. What type of molecule is this?

Select one: a. steroid

b. fatty acid

c. amino acid

d. nucleotide

e. phospholipid

Feedback The correct answer is: steroid

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Question text 3

Why is sickle cell disease more common in Americans with African ancestors than Americans with European ancestors?

Select one: a. Sickle-shaped blood cells caused malarial parasites to die, and thus gave protection against

malarial infections prevalent in Africa b. Sickle-shaped blood cells were good hosts for tuberculosis, and thus spread tuberculosis widely throughout Africa c. Sickle-shaped blood cells caused cholera bacteria to die, and thus gave protection against largescale cholera epidemics throughout Europe d. Sickle-shaped blood cells caused tuberculosis bacteria to die, and thus gave protection against large-scale Tb epidemics throughout crowded areas in Africa e. Sickle-shaped blood cells were good hosts for cholera bacteria, and thus caused many people to die from cholera and diarrhea

Feedback The correct answer is: Sickle-shaped blood cells caused malarial parasites to die, and thus gave protection against malarial infections prevalent in Africa Question 24 Incorrect Mark 0.00 out of 1.00 Flag question 0

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Question text 3

Where are the majority of ribosomes found inside the cell?

Select one: a. cytoskeleton

b. nuclear envelope

c. smooth endoplasmic reticulum

d. rough endoplasmic reticulum

e. mitochondria

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The correct answer is: rough endoplasmic reticulum Question 25 Correct Mark 1.00 out of 1.00 Flag question 0

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Question text 3

Each of the following is a defining characteristic of life except _______.

Select one: a. disorder

b. use of materials and energy

c. reproduction

d. homeostasis

e. responsiveness to stimuli

Feedback The correct answer is: disorder Question 26

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Question text 3

Using the plant cell diagram, identify the cell structure marked "d."

Select one:

a. central vacuole

b. smooth endoplasmic reticulum

c. nucleus

d. cytoplasm

e. Golgi apparatus

Feedback The correct answer is: cytoplasm Question 27 Incorrect Mark 0.00 out of 1.00 0

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Question text 3

Which of the following is not a part of the cell theory?

Select one: a. the cell is the basic unit of life

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b. all living things are made of cells

c. new cells arise only from preexisting cells

d. anything smaller than a cell is not alive

e. only eukaryotes are made of cells

Feedback The correct answer is: only eukaryotes are made of cells Question 28 Correct Mark 1.00 out of 1.00 0

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Question text 3

What is the result of unequal sharing of electrons between two atoms?

Select one: a. a nonpolar molecule, such as methane

b. an ionic compound, such as salt

c. an electronegative molecule, such as calcium ion

d. a hydrophobic molecule, such as fat

e. a polar molecule, such as water

Feedback The correct answer is: a polar molecule, such as water Question 29 Incorrect Mark 0.00 out of 1.00 0

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Question text 3

Which cytoskeletal fibers make up the internal structure of the cilia and flagella?

Select one: a. keratin filaments

b. microtubules

c. intermediate filaments

d. actin filaments

e. myosin

Feedback The correct answer is: microtubules Question 30 Incorrect Mark 0.00 out of 1.00 0

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Question text 3

Which of the following would be explainable due to something other than the descent of living things from one common ancestor?

Select one: a. Life is organized.

b. Life is photosynthetic.

c. Life is homeostatic.

d. Life forms ecosystems.

e. Life evolves.

Feedback The correct answer is: Life is photosynthetic.

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Question text 3

What is the function of cristae in the inner membrane of mitochondria?

Select one: a. allow sunlight to penetrate easily and quicken photosynthesis

b. promote the concentration of chlorophyll molecules in one area

c. allow direct diffusion of glucose into the inside of the mitochondria

d. collect water molecules needed for metabolism

e. provide larger surface area for ATP synthesis

Feedback The correct answer is: provide larger surface area for ATP synthesis Question 32 Incorrect Mark 0.00 out of 1.00 0

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Question text 3

Which of the following is true of ATP? Select one: a. It is used for long term energy storage

b. It has a base of adenine, the sugar ribose, and three phosphate groups

c. It contains adenine, ribose, and two phosphate groups

d. It has a base of adenine, the sugar deoxyribose, and three phosphate groups

e. It is very stable)

Feedback The correct answer is: It has a base of adenine, the sugar ribose, and three phosphate groups Question 33 Incorrect Mark 0.00 out of 1.00 0

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Question text 4

What type of organism uses chitin for structure and support?

Select one: a. bacterium

b. cactus

c. human

d. tree

e. crab

Feedback The correct answer is: crab

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Question text 3

Which of the following is likely to not be found in a phospholipid?

Select one: a. a nonpolar head

b. two fatty acids

c. a phosphate group

d. some nonpolar tails

e. a glycerol group

Feedback The correct answer is: a nonpolar head Question 35 Correct

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Question text 4

What type of sugar is transported in plants and used as table sugar?

Select one: a. sucrose

b. glucose

c. lactose

d. galactose

e. fructose

Feedback The correct answer is: sucrose Question 36 Incorrect Mark 0.00 out of 1.00

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Question text 3

What type of cell would have lysosomes and a nucleus, but no chloroplasts?

Select one: a. bacterial cell

b. archaean cell

c. animal cell

d. plant cell

e. prokaryotic cell

Feedback The correct answer is: animal cell Question 37 Correct Mark 1.00 out of 1.00

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Question text 3

Each of the following could be studied as organic biomolecules except ______.

Select one: a. nucleic acids

b. carbohydrates

c. water

d. lipids

e. proteins

Feedback The correct answer is: water Question 38 Incorrect Mark 0.00 out of 1.00

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Question text 4

What level of protein structure is found in most enzymes and hemoglobin?

Select one: a. dipeptide

b. primary

c. tertiary

d. quaternary

e. secondary

Feedback The correct answer is: quaternary Question 39 Correct Mark 1.00 out of 1.00

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Question text 3

Where is the site for breakdown of engulfed bacteria, debris and macromolecules in an animal cell?

Select one: a. peroxisomes

b. rough endoplasmic reticulum

c. lysosomes

d. mitochondria

e. smooth endoplasmic reticulum

Feedback The correct answer is: lysosomes Question 40 Correct Mark 1.00 out of 1.00

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Question text 3

_______ is an atom with an unequal number of protons and electrons.

Select one: a. An isotope

b. An ion

c. A compound

d. An octet

e. A valance

Feedback The correct answer is: An ion Mfhh2KUNrX

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