BIOL 1500 LAB FINAL EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
True or False: If a patient had the results of two random glucose reading of
2000mg/dL of higher this meets the criteria of diabetes mellitus - ANSWER-True
What are the three micropipettes routinely used in our lab? - ANSWER-P1000,
P200, & P20
Percent is expressed as - ANSWER-Standard deviation from the mean
Which instrument will you be using to measure absorbance in the analytical
technique lab? - ANSWER-Spectrophotometer
In the analytical technique lab, how was the ideal wavelength found? - ANSWER-By
observing the data values given by the spectrophotometer and looking for the
wavelength with the highest degree of absorption.
Explain what happened to the change in weight of the potatoes as the
concentrations of sucrose increased. - ANSWER-As the concentration levels
increased the percent change in mass decreased
Distinguish between the processes of diffusion and osmosis. - ANSWER-Osmosis:
the movement of water molecules from a region of high free water concentration to a
region of low concentration Diffusion: passive transport by which molecules move
from areas of high concentration to areas of low concentration.
True or False: Diffusion requires no energy transport. - ANSWER-True
Red blood cells in seawater - ANSWER-Crenation
Red blood cells in distilled water - ANSWER-Hemolysis or lysis
Plant leaf in a hypertonic solution - ANSWER-Plasmolysis
Water moves into the cell and it lyse - ANSWER-Hypotonic
The solution moves out of the cell and the cell will shrink - ANSWER-Hypertonic
Homeostasis is achieved - ANSWER-Isotonic
The movement of water molecules from a region of high free water concentration to
a region of low concentration is known as - ANSWER-Osmosis
Passive transport by which molecules from areas of high concentration to areas of
low concentration is known as - ANSWER-Diffusion
, What are will be using in lab today to study osmosis and diffusion across living
membranes? - ANSWER-Potato
Areas of high concentration are considers - ANSWER-Hypertonic
In a concentration gradient, molecules always flow down a concentration gradient
(from low to high) because it costs zero energy to do so - ANSWER-False; from high
to low
True or False:Osmosis is the passive movement of water through a semipermeable
membrane. - ANSWER-True
True or False: Diffusion is active transport by which molecules from areas of high
concentration to areas of low concentration. - ANSWER-False: passive
Molecules always tend to flow ______ a concentration gradient - ANSWER-Down
Water diffuses from areas of ______solute concentration (high free water) to ______
solute concentration (low free water). - ANSWER-Low;high
What is the range of the micropipette? P20 P200 P1000 - ANSWER-1-20;20-
200;200-1000
Genetics - ANSWER-The study of genes and their heredity and variation traits in
organisms.
Gametes - ANSWER-A type of mature haploid of both sexes that unite with the
opposite sex in the processes of sexual reproduction to from the zygote.
Monohybrid Cross - ANSWER-The mix of two different individual who have
homozygous genotypes, either both dominant or recessive alleles.
Alleles - ANSWER-Responsible for variations in inherited characteristics.
Dominant alleles - ANSWER-Always expressed in the appearance of an organisms.
Recessive alleles - ANSWER-Sometimes hidden or masked.
Phenotype - ANSWER-The composition of the characteristics or traits of an
organisms.
Genotype - ANSWER-This is the genetic makeup of the cell and this determines a
type of characteristics that the organism will have.
Explain the difference between precision and accuracy - ANSWER-Accuracy defined
as how close the result is to the target and precision is how close to each other those
results were.
QUESTIONS WITH COMPLETE
SOLUTIONS
True or False: If a patient had the results of two random glucose reading of
2000mg/dL of higher this meets the criteria of diabetes mellitus - ANSWER-True
What are the three micropipettes routinely used in our lab? - ANSWER-P1000,
P200, & P20
Percent is expressed as - ANSWER-Standard deviation from the mean
Which instrument will you be using to measure absorbance in the analytical
technique lab? - ANSWER-Spectrophotometer
In the analytical technique lab, how was the ideal wavelength found? - ANSWER-By
observing the data values given by the spectrophotometer and looking for the
wavelength with the highest degree of absorption.
Explain what happened to the change in weight of the potatoes as the
concentrations of sucrose increased. - ANSWER-As the concentration levels
increased the percent change in mass decreased
Distinguish between the processes of diffusion and osmosis. - ANSWER-Osmosis:
the movement of water molecules from a region of high free water concentration to a
region of low concentration Diffusion: passive transport by which molecules move
from areas of high concentration to areas of low concentration.
True or False: Diffusion requires no energy transport. - ANSWER-True
Red blood cells in seawater - ANSWER-Crenation
Red blood cells in distilled water - ANSWER-Hemolysis or lysis
Plant leaf in a hypertonic solution - ANSWER-Plasmolysis
Water moves into the cell and it lyse - ANSWER-Hypotonic
The solution moves out of the cell and the cell will shrink - ANSWER-Hypertonic
Homeostasis is achieved - ANSWER-Isotonic
The movement of water molecules from a region of high free water concentration to
a region of low concentration is known as - ANSWER-Osmosis
Passive transport by which molecules from areas of high concentration to areas of
low concentration is known as - ANSWER-Diffusion
, What are will be using in lab today to study osmosis and diffusion across living
membranes? - ANSWER-Potato
Areas of high concentration are considers - ANSWER-Hypertonic
In a concentration gradient, molecules always flow down a concentration gradient
(from low to high) because it costs zero energy to do so - ANSWER-False; from high
to low
True or False:Osmosis is the passive movement of water through a semipermeable
membrane. - ANSWER-True
True or False: Diffusion is active transport by which molecules from areas of high
concentration to areas of low concentration. - ANSWER-False: passive
Molecules always tend to flow ______ a concentration gradient - ANSWER-Down
Water diffuses from areas of ______solute concentration (high free water) to ______
solute concentration (low free water). - ANSWER-Low;high
What is the range of the micropipette? P20 P200 P1000 - ANSWER-1-20;20-
200;200-1000
Genetics - ANSWER-The study of genes and their heredity and variation traits in
organisms.
Gametes - ANSWER-A type of mature haploid of both sexes that unite with the
opposite sex in the processes of sexual reproduction to from the zygote.
Monohybrid Cross - ANSWER-The mix of two different individual who have
homozygous genotypes, either both dominant or recessive alleles.
Alleles - ANSWER-Responsible for variations in inherited characteristics.
Dominant alleles - ANSWER-Always expressed in the appearance of an organisms.
Recessive alleles - ANSWER-Sometimes hidden or masked.
Phenotype - ANSWER-The composition of the characteristics or traits of an
organisms.
Genotype - ANSWER-This is the genetic makeup of the cell and this determines a
type of characteristics that the organism will have.
Explain the difference between precision and accuracy - ANSWER-Accuracy defined
as how close the result is to the target and precision is how close to each other those
results were.
