Exam 1
The nucleus of an atom contains ____.
Protons and Neutrons
The first step in aerobic respiration is ____.
Glycolysis
Which pair represents the correct complementary bonding of nitrogen-containing bases in a DNA molecule?
adenine and cytosine
adenine and guanine
guanine and thymine
guanine and cytosine
cytosine and thymine
guanine and cytosine
This arthropod is the vector for Lyme disease.
ticks
Mutations that result in the death of the individual are known as ____
Beneficial
Lethal
Random
Spontaneous
Neutral
Lethal
On a very hot summer day and a few months later on a very cold winter day, you go outside and take your temperature. Each time your body temperature is 37 degrees Celsius. This example illustrates ____.
Homeostasis
Glycolysis takes place in ____.
the cytoplasm
In prokaryotes, transcription occurs in the _____.
cytoplasm
The supercontinent that once contained all of Earth’s landmasses is known as _____.
Pangea
The interaction between two species in which both species may be harmed is known as ____.
competition
Which organelle completes protein modifications and packages the protein for export?
Golgi body
In chloroplasts, the Calvin–Benson cycle occurs in ____.
Stroma
What does DNA ligase do?
seals gaps between assembled nucleotides
Fossilization most often occurs through the geologic process(es) of ____.
Sedimentation and compaction
A(n) ____ is an observed consequence of global climate change.
Increase in earthquakes
Acid rain
Increase in the ozone hole
Decrease in the ozone layer
Rise in sea level
Rise in sea level
Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?
Gap Junction
Which of the following is the proper sequence for mitosis?
I. metaphase
II. telophase
III. prophase
IV. anaphase
III, I, IV, II
PMATI
What adds RNA nucleotides, one at a time, during transcription?
RNA Polymerase
The _____ dominate(s) in the life cycle of bryophytes.
sporophyte stage
The monarch butterfly is poisonous to birds; therefore, birds avoid eating them. Viceroy butterflies look very similar to monarch butterflies but are not poisonous. Because they look like monarch butterflies, birds also do not eat viceroy butterflies. This is an example of ____.
mimicry
Enzymes speed up a chemical reaction by ____.
lowering the activation energy
Crossing over is one of the most important events in meiosis because it _____.
Produces new combinations of alleles of chromosomes
In an autosomal dominant disorder such as Huntington’s disease, two heterozygous parents have the probability of passing the gene onto ____ of their children.
75%
Which part of the amphibian life cycle prevents them from being fully terrestrial?
finding a mate
Respiration
obtain food
Locomotion
Reproduction
Reproduction
A small Dutch population settled in South Africa in the 17th century and became known as Afrikaners. By chance, a few Dutch settlers carried the gene for Huntington’s disease. Today, Huntington’s disease occurs at a relatively high frequency in this population. This is an example of ____.
Artificial selection
Natural selection
Gene flow
The founders effect
The bottle neck effect
The founder effect