Uploaded by raul arcila

Scientific method

A scientific procedure undertaken to make a discovery, test a hypothesis, or
demonstrate a known fact is a/an
A) experiment
B) law
C) theory
D) hypothesis
What skill is a scientist using when she listens to the sounds that whales makes.
A) making observations
B) drawing conclusions
C) making a hypothesis
D) interpreting data
What is formed by a group of cells and tissues that work together to carry out a specific
A) Organelle
B)Organ System
A group of interacting organisms living in the same area made up of similar species is
A) organism
B) population
C) mutualism
D) community
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.
A) plant
B) prokaryotic
C) fungal
You find a cell of a type you have never seen before. The cell has both a nucleus and a
cell wall. Therefore, you conclude that it must be a ______ cell.
A) plant
B) prokaryotic
C) animal
D) bacterial
Why, when mixed with water, do phospholipids spontaneously form membranes?
A)Phospholipids have hydrophilic phosphate groups that are attracted to their
hydrophobic fatty acid tails.
B)Phospholipids have hydrophilic fatty acid tails that are attracted to water and
hydrophobic phosphate groups that avoid water.
C)Phospholipids do not spontaneously form membranes when mixed with water.
D)Phospholipids have hydrophilic phosphate groups that are attracted to water and
hydrophobic fatty acid tails that avoid water.
Which of these is NOT a function of the plasma membrane?
A) attachment to the extracellular matrix
B) cell-cell recognition
C) control center of the cell
D) cell signaling
______ code for the structure of proteins.
Most human cells contain ______ chromosomes.
Which of the following organelles does NOT have a membrane?
A) ribosome
B) nucleous
C) chloroplast
D) Golgi apparatus
Information is transferred from the nucleus to ribosomes via ______.
D) rER
Which of the following is a function of the Golgi apparatus?
A) cellular respiration
B) protein synthesis
C) drug detoxification
D) protein modification
Diffusion occurs because
a. molecules are attracted to one another.
b. molecules constantly move and collide with each other.
c. cellular energy forces molecules to collide with each other.
d. cellular energy pumps molecules across the cell membrane.
During diffusion, when the concentration of molecules on both sides of a membrane is
the same, the molecules will
a. move across the membrane to the outside of the cell.
b. stop moving across the membrane.
c. continue to move across the membrane in both directions.
d. move across the membrane to the inside of the cell.
Early Earth
(a) had a primitive atmosphere of ammonia, methane, water vapor, and carbon dioxide.
(b) lacked much oxygen gas.
(c) probably had a very hot environment.
(d) all of the above
Archaea are composed of ______ cells.
The Permian extinction probably
(a) occurred because photosynthesis stopped and the planet cooled.
(b) occurred at the beginning of the Mesozoic Era, allowing the dinosaurs to evolve.
(c) killed most life on Earth except for small reptiles and mammals.
(d) all of the above
Which period was the “golden age of dinosaurs”?
(a) the Triassic Period
(b) the Jurassic Period
(c) the Cretaceous Period
(d) the Tyrannosaurus Period
The oldest rocks thus far found on the Earth's surface have ages of about
A) 3.5 million years
B) 3.5 billion years
C) 35 years
D) 3.5 thousand years
Stromatolites are colonial structures consisting of layers of:
A. prokaryotic organisms
B. single celled fungi
C. eukaryotic organisms
D. amino acids
How did Earth change about 2.5 billion years ago when many organisms began using
photosynthesis to make food?
1 The amount of oxygen in the atmosphere increased.
2 Mass extinctions occurred.
3 The oceans became larger.
4 Rainfall increased.
When the dinosaurs went extinct ____________ million years ago, the ____________took over.
(a) 65, reptiles
(b) 65, mammals
(c) 145, mammals
(d) 65, birds
Which two domains consist only of single-celled prokaryotes?
(a) Bacteria and Archaea
(b) Bacteria and Eukaryota
(c) Archaea and Eukaryota
(d) Prokaryota and Bacteria
Hydrolysis of glycoside bond involves
A) breakdown of glycosidic bonds
B) formation of glycosidic bonds
C) formation of hydrogen bond
D) formation of ionic bond
Milk sugar is made from
A) maltose and fructose
B) sucrose and fructose
C) glucose and fructose
D) glucose and galactose
Amino acids which are no synthesized by human body are called
A) essential amino acids
B) non essential amino acids
C) simple amino acids
D) complex amino acids
The sugar in RNA is __________ , the sugar in DNA is __________
A. deoxyribose, ribose
B. ribose, deoxyribose
C. ribose, phosphate
D. ribose, uracil
The order of elements in the periodic table is based on
a. the number of protons in the nucleus.
b. the electric charge of the nucleus.
c. the number of neutrons in the nucleus.
d. atomic mass.
Atoms of elements that are in the same group have the same number of
a. protons.
c. valence electrons.
b. neutrons.
d. protons and neutrons.
Elements in an element family have similar
a. atomic symbols.
c. atomic weights.
b. atomic sizes.
d. chemical properties.
Magnesium (Mg) is located to the right of sodium (Na) because Mg has
a. fewer protons.
c. no protons.
b. no neutrons.
d. more protons.
Which of the following is NOT one of the four fundamental forces?
A) Gravity
B) Strong nuclear force
C) Kinetic energy
D) Electromagnetism
"For every action there is an equal and opposite reaction" is a statement of
A) Kepler's first law of planetary motion.
B) Newton's third law of motion.
C) the correspondence principle.
D) the theory of relativity.
Imagine looking through a microscope at a squashed onion root tip. The chromosomes
of many of the cells are plainly visible. In some cells, replicated chromosomes are
aligned along the center (equator) of the cell. These particular cells are in which stage of
mitosis? A) telophase
B) prophase
C) anaphase
D) metaphase
E) prometaphase
Why do chromosomes coil during mitosis?
A) to increase their potential energy
B) to allow the chromosomes to move without becoming entangled and breaking
C) to allow the chromosomes to fit within the nuclear envelope
D) to allow the sister chromatids to remain attached
If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it
have during anaphase?
A) 1
B) 2
C) 4
D) 8
E) 16
Chromosomes first become visible during which phase of mitosis?
A) prometaphase
B) telophase
C) prophase
D) metaphase
E) anaphase
Which of the following are products of the light reactions of photosynthesis that are
utilized in the Calvin cycle?
A) CO2 and glucose
B) H2O and O2
D) electrons and H+
When oxygen is released as a result of photosynthesis, it is a by-product of which of the
A) reducing NADP+
B) splitting the water molecules
C) chemiosmosis
D) the electron transfer system of photosystem I
Which of the following statements best describes the relationship between
photosynthesis and respiration?
A) Respiration is the reversal of the biochemical pathways of photosynthesis.
B) Photosynthesis stores energy in complex organic molecules, while respiration
releases it. C) Photosynthesis occurs only in plants and respiration occurs only in
D) ATP molecules are produced in photosynthesis and used up in respiration.
Generation of proton gradients across membranes occurs during
A) photosynthesis.
B) respiration.
C) both photosynthesis and respiration.
D) neither photosynthesis nor respiration.
What is the primary function of the Calvin cycle?
A) use ATP to release carbon dioxide
B) use NADPH to release carbon dioxide
C) split water and release oxygen
D)synthesize simple sugars from carbon dioxide
Sunlight +6H20 + 6CO2--> C6H1206 +6O2 - What does the equation above represent?
A. Cellular Respiration
B. Human Respiration
C. Photosynthesis
D. Solar Energy
What are the two reactions that take place in the process of photosynthesis?
A. Intermediate Reaction and Beginning reaction
B. Light Reactions and the Calvin Cycle
C. The Krebs Cycle and Glycolysis
D. Respiration and Exhalation
During respiration, most ATP is formed as a direct result of the net movement of
(A)potassium against a concentration gradient
(B) protons down a concentration gradient
(C) electrons against a concentration gradient
(D) electrons through a channel
Where does the process of glycolysis take place?
A. Cytoplasm
B. Nucleus
C. Mitochondria
D. Chloroplast
C6H1206 +6O2--> 6H20 + 6CO2 + ATP - The equation listed represents the overall
reaction that takes place during which process?
A. Photosynthesis
B. Cellular Respiration
C. Human Respiration
D. DNA Replication
What step of Cellular Respiration is the majority of the energy produced?
A. Calvin Cycle
B. Light Reactions
C. Krebs Cycle
D. Electron Transport Chain
What is an autotroph?
A. An animal that eats out of a trough
B. An organism that makes its own food
C. An organism that eats using its mouth
D. An organism that makes its own food
One of the main ways CO2 is removed from the atmosphere is _______________.
A. photosynthesis
C. combustion
B. respiration
D. decomposition
Which process releases dinitrogen gas (N2) back into the atmosphere?
nitrogen fixation
What is the most common way that nitrogen fixation occurs?
nitrogen fixing bacteria
fossil fuel combustion
forest fires
How does phosphorus enter an ecosystem?
Through the weathering of rocks
All of the answers are correct.
Through decaying plants
Through animal waste
The entire nervous system is divided into two main regions: The _________
A) Brain and the spinal chord
B) CNS and the PNS
C) Neurons and the glial cells
D) Motor neurons and the sensory neurons
All the nervous tissue outside the brain and spinal cord is the ______ nervous system.
A) Peripheral
B) Autonomic
C) Somatic
D) Central
White blood cells help protect the body from illness by engulfing diseasecausing
organisms. Which organ system produces white blood cells?
A) circulatory system
B) skeletal system
C) immune system
D) Lymphatic system
Acquired immunity is a result of previous exposure
a) serious illness
b) to vaccination
c) repeated exposure to the same factor
d) treatment with penicillin
Which term describes the relatively constant internal physical conditions of an
a. cell specialization
b. homeostasis
c. organ system
d. unicellularity
After sperm cells are produced, they are mainly stored in the
A) bulbourethral gland.
B) epididymis.
C) prostate.
D) seminal vesicles.
What process is involved in reproduction of flowering plant?
A. Pollination
B. Fertilization
C. Both A and B
D. None of the above
What can carry pollen from one flower to another?
A. Wind
B. Animal
C. Water
D. All of the above