Bio Test 1

1.

1 point

Where does protein synthesis take place in prokaryotic cells?

ribosomes

pilli

flagella

2.

1 point

a _____ bond contains atoms strongly linked together via the sharing of electrons

covalent

ionic

strong

hydrogen

3.

1 point

Which kingdoms are included in Domain Eukarya?

Plants

Animals

Fungi

a,b,and c

bacteria only

4.

1 point

Iodine is a

trace element we need

an essential amino acid

one of the most abundant elements in living organisms

a protein

5.

1 point

Which disaccharide is not paired correctly with its monosaccharides?

maltose: glucose + glucose

sucrose: glucose + fructose

lactose: glucose + galactose

all are paired correctly

6.

1 point

Cilia propel in a whip-like motion, but flagella move in back and forth motion

True

False

7.

1 point

The goal of science is to understand phenomena and the goal of technology is to apply scientific knowledge for a specific purpose

True

False

8.

1 point

Magnesium has an atomic number of 12; therefor it has ___ electrons in its outermost electron shell

6

2

10

12

9.

1 point

Tay-Sachs disease is a disease in which the ____ organelle does not function properly

lysosome

vacuole

mitochondria

golgi apparatus

10.

1 point

Testosterone and Estradiol are:

steroids

carbohydrates

proteins

nucleic acids

11.

1 point

Why if you are careful are you able to float a needle on the surface of water?

the polarity of individual water molecules makes this happen

the surface tension that is a result of water's cohesive properties makes this possible

a single needle is less dense than water

water has adhesive properties

12.

1 point

Which of the following are the proper components in the proper order of the scientific method?

observation, question, opinion, conclusion, hypothesis

experiment, conclusion, application

observation, hypothesis, prediction, experiment, results, conclusion

13.

1 point

The pH of a drink is 4.0. This means that..

it is basic

it is acidic

it has an equal number of hydrogen and hydroxide ions

it has more sodium ions than chloride ions

14.

1 point

The significance of Dr. John snow's work on cholera is best reflected in which of the following statements:

He has a good pub named after him

he utilized statistical and epidemiological methods during the cholera outbreak

15.

1 point

the nucleotide bases in DNA are:

phosphate groups

amino acids

ATCG

hydrogen bond

16.

1 point

The carboxyl group of an amino acid is joined to the amine group of another amino acid. The resulting bond is called a____ bond.

ionic

covalent

peptide

hydrogen

17.

1 point

Mad cow disease is caused by

a prion

a change in a single amino acid

a multi functioning organelle

both a and c are correct

18.

1 point

you add sugar to your tea, and the sugar dissolves. Thus, the tea is the ___ and the sugar is the ____.

solute;solvent

solvent;solute

nonpolar covalent bond; ionic bond

ionic bond; nonpolar covalent bond

19.

1 point

one difference between carbon -12 and carbon -14 is that carbon -14 has

2 more neutrons than carbon -12

2 more protons than carbon -12

two more electrons than carbon -12

20.

1 point

An atom that has gained or lost one or more electrons is

an isotope

a neutron

an ion

radioactive

21.

1 point

Which of the following correctly lists bonding strength from weakest to strongest?

Hydrogen, Ionic, Covalent

Covalent, Ionic, Hydrogen

Ionic, Covalent, Hydrogen

These bonds all have equal strengths

22.

1 point

When mixed with water, phospholipids spontaneously form membranes because they _____.

have hydrophilic phosphates groups that are attracted to water and hydrophobic fatty acid tails that avoid water

are lipids

23.

1 point

Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms. Which of the following indicated the number of protons in the atom's nucleus?

atomic mass

atomic number

mass weight

24.

1 point

which of the following is not a good hypothesis?

cartilage in the knee is stronger than cartilage in the ear

sharks attack more baby whales than seals

skiers jump higher than snowboarders on the half-pipe

chocolate cake is the best birthday cake

25.

1 point

which of the following are domains

bacteria

eukarya

archae

all of the above are domains

26.

1 point

who won the nobel prize for the nature paper describing the structure of the double helix

Watson and Crick

Linus Peanaling

Craig

Roseland Franklin

27.

1 point

On a cool day in the fall you see a turtle lying on log in the sun warming up. This represents which characteristics of living organisms?

metabolism

growl and development

homeostasis

evolution

28.

1 point

___ is an example of an element

water

oxygen

29.

1 point

Some people are stating that sugar is sugar. The Princeton University study reports:

sucrose and high fructose corn syrup are the same

sucrose is causing abnormal weight gain in rats compared to high fructose corn syrup

high fructose corn syrup is causing abnormal weight gain in rats as compared to sucrose

30.

1 point

Theories became widely accepting if they are supported by an accumulation of excessive and varied evidence

True

False

31.

1 point

What is biology?

scientific study of life

scientific study of DNA

scientific study of communities

scientific study of chemicals

32.

1 point

Hydrogenated fats are popular with manufacturers because they

have a creamy, thick texture similar to solid fats

are cheaper

can advertise their product as no or low cholesterol since plants do not contain cholesterol

last longer than animal fats so a product can remain on the shelf longer

all the statements are correct

33.

1 point

What is the name given to the following reaction? galactose+glucose -->lactose +water

glycolysis

hydrolysis

hydrogenation

dehydration reaction

34.

1 point

There are 20 amino acids. What makes one amino acid different from another?

different carbon groups

different amino groups attached to the alpha carbon

different size chains

different alpha carbons

35.

1 point

Plant cells have cell walls outside their membranes to

protect the cell

help maintain their shape

keep the cells from absorbing too much water

a, b, and c

36.

1 point

Which of the following statements about glycogen is correct

plants store excess glucose as glycogen

animals store excess glucose as glycogen

oxygen is a polysaccharide

statements b and c are correct

37.

1 point

Which of the following is not true:

light passes through specimens on a light microscope

scanning electron microscopes are for viewing cell surfaces

transmission electron microscopes are for viewing internal details of the cell

all the above statements are true

38.

1 point

Lack of fluoride causes a goiter

True

False

39.

1 point

What is the chemical mechanism by which cells make monomers from polymers?

hydrolysis

dehydration synthesis

ionic bonding of monomers

40.

1 point

An apple contains

glucose

deoxyribose

fructose

41.

1 point

Which of the following is NOT true

mitochondria are the sites of cellular respiration

photosynthesis is the conversion of light energy from sun to chemical energy of sugar

chloroplasts are the organelle that perform photosynthesis

all of the above are true

42.

1 point

a good hypothesis:

must be right

is written after the experiment

must be testable

all the above answers are correct

43.

1 point

Which of the following statements is FALSE?

Plant cell walls are made of cellulose

Radioactive isotopes are only used for "bad" reasons

Cows need the help of bacteria to get energy from the grass they eat

44.

1 point

The nuclear pores allow mRNA but not DNA to pass through

True

False

45.

1 point

The slight negative charge at one end of the water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called?

an ionic bond

a covalent bond

a hydrophobic bond

a hydrogen bond

46.

1 point

When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus, therefore, you conclude that the cell must be a type of ____ cell.

animal

prokaryotic

eukaryotic

47.

1 point

Which of the following components of a tossed salad will pass through the human digestive tract with the least digestion?

starch (on the croutons)

oil (on the dressing)

sugar

cellulose (on the lettuce)

48.

1 point

The heart has gap cell junctions?

True

False

49.

1 point

Which of the following choices does not properly pair a macromolecule with one of its building blocks

carbohydrate

amino acid

protein

lipid

50.

1 point

Fatty acids that contain the maximum number of hydrogen atoms possible (and are generally old at room temperature) are referred to as ______

saturated fatty acids

unsaturated fatty acids

trends