7433671
Descripción
Test por Stefania Schoen, actualizado hace más de 1 año
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Creado por Stefania Schoen
hace más de 7 años
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Pregunta 1
Pregunta
Which of the following statements about the image shown below is NOT an observation?
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the insect has three legs on the left side
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the insect has a pattern on its back
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the insect's pattern shows that it is poisonous
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the insect is green, white, and black
Pregunta 2
Pregunta
A scientific theory is
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the same as a hypothesis
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a well-tested explanation that unifies a broad range of observations
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the same as the conclusion of an experiment
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the first step in a controlled experiment
Pregunta 3
Pregunta
When shaking sugar and sand together in a test tube, you cause them to form a
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mixture
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compound
Pregunta 4
Pregunta
In many cells, the structure that controls the cell's activities is the
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cell membrane
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nucleolus
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organelle
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nucleus
Pregunta 5
Pregunta
To be useful in science, a hypothesis must be correct.
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- True
- False
Pregunta 6
Pregunta
A skeptical attitude in science prevents scientists from accepting new ideas.
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- True
- False
Pregunta 7
Pregunta
The process in which two cells from different parents unite to produce the first cell of a new organism is called sexual reproduction.
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- True
- False
Pregunta 8
Pregunta
The basic unit of matter is a cell.
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- True
- False
Pregunta 9
Pregunta
An enzyme speeds up a reaction by lowering the activation energy.
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- True
- False
Pregunta 10
Pregunta
The positively charged particle of an atom is called a proton.
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- True
- False
Pregunta 11
Pregunta
Which of these make up atoms? (check all that apply)
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protons
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neutrons
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cells
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electrons
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genes
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alleles
Pregunta 12
Pregunta
Which of the following are biomolecules?
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protein
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lipid
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macromolecule
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amino acid
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carbohydrate
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nucleic acid
Pregunta 13
Pregunta
Despite differences in size and shape, at some point all cells have DNA and a
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cell wall
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mitochondrion
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cell membrane
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nucleus
Pregunta 14
Pregunta
In eukaryotic cells, chromosomes carrying genetic information are found in the
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ribosomes
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nucleus
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lysosomes
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cell membrane
Pregunta 15
Pregunta
The organelles that breeak down lipids, carbohydrates, and proteins into small molecules that can be used by the cell are called
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vacuoles
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lysosomes
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ribosomes
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microfilaments
Pregunta 16
Pregunta
Cell membranes contain a central bilayer formed by
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lipids
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carbohydrates
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protein pumps
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proteins
Pregunta 17
Pregunta
The movement of water molecules across a selectively permeable membrane is known as
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exocytosis
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endocytosis
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phagocytosis
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osmosis
Pregunta 18
Pregunta
A substance that moves by passive transport tends to move
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away from the area of equilibrium
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away from the area where it is less concentrated
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away from the area where it is more concentrated
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toward the area where it is more concentrated
Pregunta 19
Pregunta
Which of the following is true of ALL single-celled organisms
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they are all prokaryotes
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they are all bacteria
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they all reproduce
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they all have a nucleus
Pregunta 20
Pregunta
A tissue is composed of a group of
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similar cells
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organ systems
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related organelles
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related organs
Pregunta 21
Pregunta
Which of the following are autotrophs?
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deer
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plants
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leopards
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mushrooms
Pregunta 22
Pregunta
Which of the following is used by cells to store and release the energy needed to power cellular processes?
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DNA
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ATP
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H2O
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CO2
Pregunta 23
Pregunta
The amount of energy stored in a molecule of ATP compared to the amount stored in a molecule of glucose is
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greater
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less
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the same
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variable
Pregunta 24
Pregunta
When a candle burns, energy is released in the form of
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carbon dioxide and water
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the chemical substance ATP
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light and heat
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electricity and motion
Pregunta 25
Pregunta
In addition to light and chlorophyll, photosynthesis requires
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water and oxygen
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water and sugars
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oxygen and carbon dioxide
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water and carbon dioxide
Pregunta 26
Pregunta
The leaves of a plant appear green because chlorophyll
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reflects blue light
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reflects green light
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absorbs blue light
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absorbs green light
Pregunta 27
Pregunta
The first process in the light-dependent reactions of photosynthesis is
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light absorption
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electron transport
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oxygen production
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ATP formation
Pregunta 28
Pregunta
Light dependent reactions begin in photosystem II, [blank_start]absorbing light[blank_end]. Next comes the [blank_start]ETC[blank_end]. After that, comes the next photosystem, [blank_start]photosystem I[blank_end]. Finally comes the [blank_start]Hydrogen Ion movement and ATP formation[blank_end].
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absorbing light
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ETC
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photosystem I
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Hydrogen Ion movement and ATP formation
Pregunta 29
Pregunta
Which substance from the light-dependent reactions of photosynthesis is a source of energy for the Calvin cycle?
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ADP
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H2O
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NADPH
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pyruvic acid
Pregunta 30
Pregunta
The light-independent reactions of photosynthesis are also known as the
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Calvin cycle
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carbon cycle
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sugar cycle
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ATP cycle
Pregunta 31
Pregunta
ATP synthase in the chloroplast membrane makes ATP, utilizing the energy of highly concentrated
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chlorophyll
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hydrogen ions
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electrons
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NADPH
Pregunta 32
Pregunta
CAM plants are specialized to survive under what conditions that would harm most other kinds of plants?
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low temperatures
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hot, dry conditions
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excess water
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long day lengths
Pregunta 33
Pregunta
Cells use the energy available in food to make a final energy-rich compound called
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water
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glucose
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ATP
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ADP
Pregunta 34
Pregunta
Each gram of glucose contains approximately how much energy?
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1 calorie
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4 calories
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1 Calorie
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4 Calories
Pregunta 35
Pregunta
The process that releases energy from food in the presence of oxygen is
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synthesis
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cellular respiration
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ATP synthase
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photosynthesis
Pregunta 36
Pregunta
The first step in releasing the energy of glucose in the cell is known as
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fermentation
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the Krebs cycle
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glycolysis
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electron transport
Pregunta 37
Pregunta
The net gain of energy in glycolysis from one molecule of glucose is
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4 ATP molecules
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8 ADP molecules
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2 ATP molecules
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3 pyruvic acid molecules
Pregunta 38
Pregunta
In eukaryotes, the Krebs cycle takes place within the
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chloroplast
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nucleus
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mitochondrion
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cytoplasm
Pregunta 39
Pregunta
The electron transport chain uses the high-energy electrons from the Krebs cycle to
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produce glucose
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move H+ ions across the inner mitochondrial membrane
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convert acetyl-CoA to citric acid
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convert glucose to pyruvic acid
Pregunta 40
Pregunta
Because fermentation takes place in the absence of oxygen, it is said to be
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aerobic
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anaerobic
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cyclic
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oxygen-rich
Pregunta 41
Pregunta
The process carried out by yeast that causes bread dough to rise is
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alcoholic fermentation
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lactic acid fermentation
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cellular respiration
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yeast mitosis
Pregunta 42
Pregunta
During heavy exercise, the buildup of lactic acid in muscle cells results in
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cellular respiration
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fermentation
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oxygen debt.
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the Krebs cycle
Pregunta 43
Pregunta
The rate at which materials enter and leave the cell depends on the cell's
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volume
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speciation
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weight
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surface area
Pregunta 44
Pregunta
In order for a cell to divide successfully, the cell must first
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duplicate its genetic information
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decrease its volume
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increase its number of chromosomes
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decrease its number of organelles
Pregunta 45
Pregunta
The process that increases genetic diversity within a population is
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asexual reproduction
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cell division
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sexual reproduction
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binary fission
Pregunta 46
Pregunta
Sister chromatids are attached to each other at an area called the
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centriole
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spindle
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centromere
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chromosome
Pregunta 47
Pregunta
If a cell has 12 chromosome, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis?
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4
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6
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12
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24
Pregunta 48
Pregunta
In plant cells, what forms midway between the divided nuclei during cytokinesis?
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nuclear membrane
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cell membrane
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centromere
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cell plate
Pregunta 49
Pregunta
The timing in the cell cycle in eukaryotic cells is believed to be controlled by a group of closely related proteins known as
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chromatids
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centromeres
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cyclins
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centrioles
Pregunta 50
Pregunta
Which statement does NOT describe external regulatory proteins?
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They respond to events occurring inside a cell
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Growth factors are one group of external regulatory proteins
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They can speed up or slow down the cell cycle
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Some can cause cells to slow down or stop their cell cycles
Pregunta 51
Pregunta
Bone marrow cells that produce blood cells are best categorized as
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embryonic stem cells
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pluripotent
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adult stem cells
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totipotent cells
Pregunta 52
Pregunta
Which type of cell has the potential to develop into any type of cell?
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totipotent
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pluripotent
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multipotent
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differentiated
Pregunta 53
Pregunta
Unlike mitosis, meiosis in male mammals results in the formation of
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one haploid gamete
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three diploid gametes
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four diploid gametes
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four haploid gametes
Pregunta 54
Pregunta
A gene map shows
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the number of possible alleles for a gene
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the relative locations of genes on a chromosome
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where chromosomes are in a cell
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how crossing-over occurs
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