Chapter 1-3 Quiz

Beschreibung

Quiz am Chapter 1-3 Quiz, erstellt von Karen Deseo am 12/04/2018.
Karen Deseo
Quiz von Karen Deseo, aktualisiert more than 1 year ago
Karen Deseo
Erstellt von Karen Deseo vor mehr als 7 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
Membrane phospholipids
Antworten
  • have hydrophobic heads that face the centre of the membrane and are shielded from water.
  • have hydrophilic tails that face outward and are exposed to water.
  • are able to drift about in the plasma membrane
  • remain fluid because they are tightly packed against one another.

Frage 2

Frage
A hypothesis is
Antworten
  • the same as a theory
  • a proposed explanation for a set of observations
  • an explanatory idea that is broad in scope and supported by a large body of evidence
  • a widely accepted idea about a phenomenon

Frage 3

Frage
Which level in the hierarchy shown is a community?
Antworten
  • all environments on earth supporting life
  • savannah
  • all organisms in the savannah
  • group of cheetahs

Frage 4

Frage
Which of the following organisms belongs to the group represented in Box 1?
Antworten
  • giraffe
  • tree
  • decomposing bacteria
  • leopard

Frage 5

Frage
Which of the following statements regarding a common cellular activity is false?
Antworten
  • cells respond to the environment
  • cells develop and maintain complex organization
  • cells regulate their internal environment
  • new cells are derived from cellular components like organelles

Frage 6

Frage
You notice that over the past month, many students on campus have started wearing a new style of school sweatshirt. You think to yourself that perhaps the bookstore has recently started selling this new sweatshirt style. This prediction is an example of
Antworten
  • an experimental question.
  • a type of observation.
  • a hypothesis.
  • an experiment.

Frage 7

Frage
Which of the following is a trace element in the human body?
Antworten
  • nitrogen
  • zinc
  • oxygen
  • hydrogen

Frage 8

Frage
What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?
Antworten
  • 6
  • 8
  • 12
  • 18

Frage 9

Frage
A hydrogen atom has one electron. How many covalent bonds can hydrogen form?
Antworten
  • one covalent bond
  • two covalent bonds
  • four covalent bonds
  • no covalent bonds

Frage 10

Frage
Household ammonia has a pH of 12; household bleach has a pH of 13. Which of the following statements about them is true?
Antworten
  • Both of these substances are strong acids.
  • The ammonia has 10 times as many OH- ions as the bleach.
  • The ammonia has 10 times as many H+ ions as the bleach.
  • A solution that could buffer the bleach and ammonia would remove excess OH- ions.

Frage 11

Frage
________ are weak bonds that are not strong enough to hold atoms together to form molecules but are strong enough to form bonds within and around large molecules.
Antworten
  • ionic
  • covalent
  • polar covalent
  • hydrogen bonds
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