WorksheetsQuizizz #22 (2021-2022) LE
Total questions: 20
Worksheet time: 40mins
In a DNA molecule, if 38% of the molecular bases are C (cytosine), what percent of the bases are T (thymine)?
12
24
38
62
Traits are passed from parents to offspring. These traits are determined by
chromosomes, located on genes, found in the nucleus
genes, located on chromosomes, found in the nucleus
chromosomes, located on genes, found in the ribosomes
genes, located on chromosomes, found in the ribosomes
Identical twins were separated at birth and raised by two different families. Years later, one twin was a physically fit member of the cross-country team, and the other twin was overweight with slightly higher-than-normal blood pressure. The differences in these twins could be explained by the fact that
the genes in the two individuals are completely different
in twins, each individual inherits genes from only one parent
the DNA bases in twins combine differently
the environment can influence the expression of genes
Protein synthesis is accomplished primarily by the interaction of which two cell structures?
vacuoles and mitochondria
ribosomes and vacuoles
nuclei and ribosomes
nuclei and mitochondria
Which term would best represent X?
If an DNA sequence reads AGGCTA then the mRNA sequence would read
TCCGAT
UGGCUA
UCCGAU
What process requires energy?
active transport
osmosis
diffusion
passive transport
creating large, complex molecules by combining smaller molecules is referred to as ____
excretion
transport
synthesis
homeostasis
A solution with a pH of 9 is a(n) ___.
Acid
Base
A result of aerobic respiration is a molecule of ____ and waste products of ____ and ____.
glucose
CO2
H2O
ATP
glucose
CO2
ATP
CO2
H2O
glucose
ATP
CO2
Organic compounds such as starch are too ___ to fit though the cell membrane. They must be digested into ___ before they can be absorbed
Big
simple sugars
Big
amino acids
small
amino acids
Big
fatty acids
What cell organelle directly controls the movement of molecules into and out of a cell?
Cell wall
Cell membrane
nucleus
lysosome
An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.
In this investigation, the independent variable is the
control
exercise
rate of squeezing
number of participants
An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.
Muscle fatigue occurs during this activity when
carbon dioxide is used up in the muscle cells
simple sugar is converted to starch in the muscle cells
proteins accumulate in mitochondria in the muscle cells
certain waste products collect in the muscle cells
An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.
The experimental results could be made more valid by
increasing the number of students
using safety precautions
using a plastic clothespin
making a bar graph of the data
An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.
The dependent variable for this experiment is the
time the student was squeezing the clothespin
number of times the student was able to squeeze the clothespin
strength of the student
length of the clothespin
A student hypothesized that watching sports on television would cause viewers’ pulse rates to increase. She designed an experiment to determine the effect of watching sports on pulse rate. A group of 200 volunteers took their pulse rates and then watched their favorite sports on television. After the games, they immediately took their pulse rates again. The data collected showed that the pulse rates of some people increased, but the pulse rates of an equal number of people did not change. Although the hypothesis was not supported by the data, the hypothesis is still valuable because it
may lead to further investigation
can be changed to fit the data
is the opinion of the experimenter
is based on beliefs of the volunteers
If a control group is not included in an experiment, it would be difficult to
formulate a hypothesis for the experiment
make observations about the experimental group
record data in a data table
draw a valid conclusion
