WorksheetsBiology KEYSTONE ISS 2019 Module A ks21
Total questions: 13
Worksheet time: 9mins
Which of the following is essential to proper functioning of
all prokaryotic and eukaryotic organisms? (BIO.A.1.1.1 2019)
O2
CO2
ATP
NaCl
Which statement best compares eukaryotic cells and prokaryotic cells? (BIO.A.1.2.1 2019)
Eukaryotic cells are smaller than prokaryotic cells.
Prokaryotic cells are more complex than eukaryotic cells.
Prokaryotic cells contain a distinct central organelle, and eukaryotic cells do not.
Eukaryotic cells contain membrane-bound organelles, and prokaryotic cells do not.
Lungs and capillaries both have porous linings that allow certain substances to move into or out of the structures. Which function do these porous linings most likely serve in living organisms? (BIO.A.1.2.2 2019)
heat release
gas exchange
carbohydrate absorption
osmotic pressure regulation
Which property of water is most responsible for plants being able to transport water from their roots to their leaves? (BIO.A.2.1.1 2019)
the attraction between molecules
a capacity to dissolve many substances
the ability to form a low-density crystalline structure when frozen
a capacity to absorb large amounts of energy as temperature increases
The element carbon has multiple bonding patterns. Which bonding pattern cannot be formed by carbon? (BIO.A.2.2.1 2019)
Which process best describes the assembly of proteins from amino acids? (BIO.A.2.2.2 2019)
Atoms are linked to form a compound.
Monomers are linked to form a polymer.
Atoms are added to a monomer until it becomes a polymer.
Molecules are added to a compound until it becomes a monomer.
Which statement best compares a carbohydrate and a nucleic acid? (BIO.A.2.2.3 2019)
The sequence of monomers in a carbohydrate stores genetic information, and the bonds in a nucleic acid store energy.
The bonds in a carbohydrate store energy, and the sequence of nucleotides in a nucleic acid stores genetic information.
A carbohydrate has a unique structure to assist diffusion across a plasma membrane, and a nucleic acid has a unique structure to assist chemical reactions.
A carbohydrate has a unique structure to assist chemical reactions, and a nucleic acid has a unique structure to assist diffusion across a plasma membrane.
Each cell in the human body contains thousands of different enzymes responsible for regulating reactions within the cell. Which statement explains why a single enzyme is unable to regulate a variety of reactions? (BIO.A.2.3.1 2019)
The binding of a product and an enzyme is specific.
The binding of a substrate and an enzyme is specific.
The enzyme is consumed by the products of the reactions.
The enzyme is consumed by the substrates of the reactions.
Which statement best describes a direct role of ATP in a paramecium? (BIO.A.3.2.2 2019)
ATP provides the energy to move cilia.
ATP stores the genetic code for replication.
ATP signals the presence of other nearby organisms.
ATP senses changes in the surrounding aquatic environment.
Which statement best describes a function of the proteins embedded in the plasma membrane of cells? (BIO.A.4.1.1 2019)
They provide instructions for the processes in the cell.
They selectively allow certain particles into and out of the cell.
They attract charges in the cell’s environment to give the cell a net charge.
They store the energy required by the rest of the membrane to perform its functions.
How does a mitochondrion facilitate the movement of some materials between cells? (BIO.A.4.1.3 2019)
It supplies the energy needed for moving molecules through membranes.
It manufactures the proteins needed to form channels in cell membranes.
It supplies digestive substances that break large molecules into smaller units.
It produces fibers that attach to molecules and move them through the cytoplasm.
Use the information presented to answer questions 12 and 13.
Stress on Plants
Plant researchers are currently investigating the concept that crop plants are negatively affected by environmental stress. Researchers propose that reducing a plant’s susceptibility to stress could result in increased crop yields.
Environmental stresses affect the molecular signals that initiate the biochemical pathways of plants. By identifying exactly which signals and which pathways are affected by specific stresses, scientists propose that a minor amount of genetic manipulation could produce healthier crops.
See figure.
To study plant stress, plant researchers use molecular indicators within the cytoplasm of specific cells. These indicators provide the researchers with the stress “warning bells” needed to identify the cause of the stress and the reaction of the plants. The most common warning bells that have been observed in stressed plants are proteins that have been folded incorrectly. These misfolded proteins
are bulky and crowd the cell, interrupting multiple cell processes. When these misfolded proteins are present, the cell is signaled to activate certain genes that will benefit future protein folding. The production of these “folding helpers” then helps to alleviate the plant’s stress signals and returns the plant to normal operating conditions.
What is the main purpose for initiating the production of folding helpers in a cell? (BIO.A.4.2.1 2019)
DNA replication
forming gametes
passive transport
maintaining homeostasis
Plants are dependent on water. In most plants, water is absorbed by the roots and then moves up the stem of the plant and into the leaves by capillary action. Which properties of water are most responsible for the capillary action in plants? (BIO.A.2.1.1 2019)
adhesion and cohesion
low density and adhesion
polarity and high specific heat
high specific heat and cohesion
