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Biology Exam 1 Flashcards | StudBud
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Biology Exam 1
Biology Exam 1
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Using this quiz to study for my collewge level biology class!
Flashcards
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Questions
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Answers
1
All cells are surrounded by a _____?
cloroplasts
Plasma membrane
Cell wall
nucleus
2
What is hydrolysis?
A reaction that involves the release of water molecules to form bonds
A chemical reaction where water is used to break down a compound
A process where small molecules are combined to form larger ones
A reaction that only occurs in the presence of heat
3
Translation at the ribosomes results in the production of proteins.
True
False
4
____ propel the cell through their whip-like motion. _____ does more in a coordinated back-and-forth motion.
cilia; flagella
flagella; cillia
5
The most important function of any membrane is to ____ the flow of materials.
regulate
stop
6
What is biology?
The composition of planets
The scientific study of life
The behavior of atoms in a chemical reaction
The laws of physics
7
Which of the following is an example of a primary source?
A biology textbook explaning cell division
A research article presenting original results on gene expression
A review paper summarizing multiple studies on climate change
A documentary discussing recent medical breakthroughs
8
What is an isotope?
A chemical compound with an unstable atomic structure
An element with a differnt number of electrons than usual
An atom of the same element with a different number of neutrons
A molecule that has gained or lost protons
9
Dietary fats come in 2 basic varieties: saturated fats and unsaturated fats
False
True
10
A ______ is a proposed explanation for an observation. A ______ is a much broader explanation.
hypothesis; theory
theory: hypothesis
11
What are carbohydrates?
Nucleic acids that carry genetic information
organic compounds made of carbon, hydrogen, and oxygen
Protiens that provide structural support for cells
Lipids that store energy in the form of fats
12
The diffusion of water is called _____
Photosynthesis
Transcription
Cellular respiration
Osmosis
13
Which of the following are the three most common types of chemical bonds?
Covalent, polar, and nonpolar
Ionic, covalent, hydrogen
Mettalic, peptide, and van der waals
Hydrogen, peptide, and ionic
14
____ contains enzymes that produce lipids. ___ contains ribosomes that produce many kinds of protiens.
rough er; smooth er
smooth er; rough er
15
What is an ion?
A charged atom that has gained or lost electrons
An atom that has lost or gained protons
A neutral molecule with no charge
An atom with an equal number of protons and electrons
16
An _______ is the fundamental unit of matter.
Atom
Organ
Organelle
Molecule
17
Which reaction links two monomers together anbd removes a molecule of water?
Oxidation
Dehydration synthesis
Hydrolysis
Combustion
18
The cell is the fundamental unit of life
False
True
19
What is adhesion
The attraction between similar molecules
The attraction between different substances
20
Diffusion is the movement of molecules from an area of _____ concentration to an area of _____ concentration.
low; high
high; low
21
____ bonds involve the sharing of one or more electrons between atoms?
Covalent
Hydrogen
Ionic
22
A buffer helps maintain a stable pH by neutralizing large amounts of acids or bases?
False
True
23
____ bonds involve the transfer of one or more electrons from one atom to another?
Ionic
Hydrogen
Covalent
24
what is pseudoscience?
A field of study that follows the scientific method and has evidence
a mathematical approach to understanding natural laws
any field of study that is falsely presented as having a scientific basis
a branch of science that studies supernatural phenomena
25
Eukaryotic cells are larger and more complex?
False
True
26
___ in the nucleus results in the production of RNA from DNA
Transcription
Translation
27
What is the main purpose of peer review in scientific research?
To garantee that all research findings are completely error-free
To allow researchers to promote their own work without scrutiny
To ensure research is evaluated by experts before publication
To make scientific research more complicated and time-consuming
28
What does a community consist of?
All life on earth
The living and non living components
A group of interacting populations of one species
All of the interacting populations in an ecosystem
29
A controlled experiment investigates a hypothesis by changing......
both variables
one variable
30
What is cohesion?
The attraction between different substances
The attraction between similar molecules
31
Only animal cells have lysosomes?
False
True
32
What does the biosphere consist of?
All the interacting populations in an ecosystem
The universe
All life on earth
Living and nonliving components
33
_____ contains most of the cells DNA stored in chromosomes.
mitochondria
nucleus
plasma membrane
cell membrane
34
A virus is alive
True
False
35
What does an ecosystem consist of?
All life on earth
A group of interacting individuals of one species
All the interacting populations in an ecosystem
The living and non living components
36
The first ring of an electron can hold 8 electrons?
False
True
37
An _______ is a component of the cell that performs a specific function.
Molecule
Organ
Atom
Organelle
38
A ______ is a group of atoms bonded together.
Organ
Molecule
Cell
Organelle
39
Prokaryotic cells are multicellular?
False
True
40
The _____ is what is being manipulated; The _____ is the response, output, or effect under investigation
dependent vairable; independent variable
Independent variable; dependent variable
41
One water molecule may participate in several covalent bonds?
False
True
42
Passive transport requires _______; Active transport requires ____.
no energy; energy
energy; no energy
43
Animal cells produce a sticky extracellular matrix that helps hold cells together
True
False
44
A blind experiment is........
where neither know who is recieving the treatment
only the researcher know who is receiving the treatment
where all details are revealed to both participants and researchers
the participants dont know if they get the treatment or placebo
45
What is a population?
All life on earth
All the interacting populations in an ecosystem
All the living and non-living components
A group of interacting individuals of one species
46
____ bonds involve weak electrical attraction between the positive and negative end of 2 polar molecules?
Ionic
Hydrogen
Covalent
47
protons have a ___ charge, Neutrons have a ___ charge, and electrons have a ___ charge.
negative, neutral, positive
neutral, positive, negative
positive, negative, neutral
positive, neutral, negative
48
What is an organic compound?
A compound that contains only hydrogen and oxygen atoms
A compound that does not contain carbon atoms
A compound made only of metals
A compound that contains carbon atoms, usually bonded with hydrogen
49
____ is the export from the cell. ____ is the import into the cell.
Exocytosis; Endocytosis
Endocytosis; Exocytosis
50
Which of the following are characteristics of unstaturated fats?
Containb only carbon and hydrogen atoms
Liquid at room temp, found in plant-based oils
Solid at room temp, found in animal products
Increase bad cholesterol levels
51
What is chemistry?
The scientific study of matter
The scientific study of the earth
The scientific study of the body
The scientific study of life
52
What is matter?
A substance that only exists in living organisms
Anything that has mass and takes up space
A chemical that is only found in cells
A form of energy that organisms use for survival
53
The _____ _____ finishes, sorts, and ships cell products
Golgi apparatus
Plasma membrane
Cell wall
54
Which four elements make up the majority of living cells
calcium, iron, sodium, potassium
Phosphorus, sulfur, magnesium, chlorine
Zinc, copper, iodine, flourine
Carbon, hydrogen, oxygen, nitrogen
