Exam I

Helpfulness: 0
Set Details Share
created 2 years ago by Nicolegleason
89 views
updated 2 years ago by Nicolegleason
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

A solution with a pH of 5 has how many times more protons in it than a solution with a pH of 7?

100 times

2

Which of the following statements correctly described cis-trans isomers?

they have variations in arrangement around a double bond.

3

Inside a cell, which chemical bond is strongest?

triple covalent bond

4

Which of the following effects can occur because of high surface tension of water?

a raft spider can walk across the surface of a small pond.

5

African bombardier beetle has two chambers in its abdomen, which of the following is incorrect?

the two chambers are always connected

6

One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+).

If the pH of blood drops, one would expect...

The HCO3- to act as a base and remove excess H+ by the formation of H2CO3.

7

Van der Waals interactions may result when___.

electrons are not symmetrically distributed in a molecule

8
card image

Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely___.

positively charged

9

A carbon atom is most likely to form what kind of bond(s) with other atoms?

covalent

10

Which bond or interaction would be difficult to disrupt when compounds are put into water?

covalent bonds between carbon atoms

11

Prokaryotes are classified as belonging to two different domains. What are the domains?

Bacteria and Archaea

12

Which of the functional groups acts most like an acid in water?

Carboxyl

13

Bonds between two atoms that are equally electronegative are...

nonpolar covalent bonds

14

Which of the following are compounds?

H2O and CH4, but not O2

15

You find yourself standing next to a beautiful rose bush. Which of the following do you and the rose have in common?

You are both multicellular

16
card image

Which of the following best describes the relationship between the atoms pictured?

They are isotopes

17

Water has many exceptional and useful properties. Which is the rarest property among compounds?

Solid water is less dense than liquid water

18

The level of the hierarchy of life that is more inclusive than community is...

ecosystem

19
card image

Which of the following illustrations is NOT a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted.

B

20

The half-life of C-14 is 5730 years. If a sample contains 8mg of C-14, how long will it take to contain 1mg?

22920

21

How many electrons are involved in a double covalent bond?

D

22

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by...

polar covalent bonds

23
card image

The figure above shows the structures of glucose and fructose. These two molecules are...

structural isomers

24

Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic material but do not have their DNA encased within a nuclear envelope?

archaean

25

Which of the following is NOT an organic molecule?

carbon dixoide

26

What determines whether a carbon atom's covalent bonds to other atoms are in a tetrahedral configuration or a planar configuration?

the presence or absence of double bonds between the carbon atom or other atoms

27

The two dynamics of the biosphere are...

cycling of chemicals and flow of energy

28

About twenty-five of the ninety-two natural elements are known to be essential to life. Which four of these twenty-five elements make up approximately 96 percent of living matter?

carbon, hydrogen, nitrogen, oxygen

29

Which of the following is the best description of a control for an experiment?

the control group is matched with the experimental group except for one experimental variable

30

In comparison to eukaryotes, prokaryotes...

are smaller

31
card image

Which of the pairs of molecular structures shown below depict enantiomers of the same molecule?

D

32

In what way are elements in the same column of the periodic table the same?

They have the same number of electrons in their valence shells when neutral

33
card image

Which of the structures illustrated above is an impossible covalently bonded molecule?

B

34

Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct statement about the atoms in ammonia (NH3)?

each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative charge

35

The element present in all organic molecules is...

carbon

36

Which of the following can be attributed to water's high specific heat?

a lake heats up more slowly than the air around it

37

A localized group of organisms that belong to the same species is called a

population

38

cells are...

characteristic of prokaryotic and eukaryotic organisms

39

trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

iodine

40

consider the following reaction at equilibrium CO2+H2O --> <--H2CO3. What would be the effect of adding additional H2CO3?

it would drive the equilibrium dynamics to the left.

41

Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic material and have their DNA encased within a nuclear envelope?

animal