Which of the following statements, from the cell theory, best supports the idea that viruses are non-living?
Sticker With A Dead Green Coronavirus Stock Illustration - Illustration of green, cartoon: 176981141
a
All animals are composed of cells.
b
All Living things are composed of cells.
c
All viruses are composed of one nucleic acid and protein.
d
All cells are produced from other cells.
What is the high-energy molecule that is the end product of the digestion of carbohydrates.
a
glucose
b
adp
c
protein
d
water
a
glucose
Herpes simplex and HIV are excellent examples of which of the following?
a
immunity
b
antigens
c
bacteria
d
virus
d
virus
Viruses reproduce through the use of host cells. In this process, viruses reproduce by injecting their DNA into the host cell and using the cell's structures to create copies of itself. After numerous copies are made, the host cell bursts and the new viruses are released. Depending on the type of virus and the host cell, hundreds or thousands of viruses can be released in this burst. These viruses then go on to reproduce through new host cells. Bacteria, however, reproduce using binary fission. In this process, a bacterium splits into two identical daughter cells. In favorable conditions, bacteria can divide once every 20 minutes. This means that a single bacterium can turn into a colony of over a billion bacteria in about ten hours.
Which statement correctly compares viral and bacterial reproduction?
a
Both viruses and bacteria can reproduce without the help of other organisms.
b
Both viruses and bacteria must have very large populations in order to reproduce.
c
Both viruses and bacteria can create large populations in a short time period.
d
Both viruses and bacteria must destroy themselves after they have reproduced.
c
Both viruses and bacteria can create large populations in a short time period.
Summarize the lytic cycle.
10.7A: The Lytic Life Cycle of Bacteriophages - Biology LibreTexts
a
A virus injects its genetic material into the host cell, copies itself using the host's structures and resources, and then forms new viruses that burst out of the host cell.
b
The viral DNA incorporates itself with the host cell’s and replicates whenever the host cell replicates itself.
c
A virus copies its own genetic material and then splits its cell membranes in half to form two identical viruses.
d
A virus lays eggs on the host cell’s protein coat, which then hatch and move on to infect other cells.
a
A virus injects its genetic material into the host cell, copies itself using the host's structures and resources, and then forms new viruses that burst out of the host cell.
When a cell needs to get rid of waste products and push them OUT OF THE CELL, which term best describe the process by which cells release substances from the cell?
a
endocytosis
b
phagocytosis
c
exocytosis
d
pinocytosis
c
exocytosis
Why does active transport require energy to move molecules of a substance across a cell membrane?
a
The cell membrane is very thick.
b
The substance moves from low to high concentration, against the concentration gradient.
c
Lack of the substance makes the cell weak.
d
The substance moves from high to low concentration, with the concentration gradient.
b
The substance moves from low to high concentration, against the concentration gradient.
Kelvin got his wisdom teeth removed and his mouth is swollen. His doctor tells him to rinse his mouth with a warm saltwater solution every few hours. How does the saltwater solution help heal Kelvin's mouth?
a
The salt water is a hypertonic solution, and the swollen cells in Kelvin's mouth will take in water through diffusion.
b
The salt water is a hypertonic solution, and the swollen cells in Kelvin's mouth will release water through osmosis.
c
The salt water is a hypotonic solution, and the swollen cells in Kelvin's mouth will release water through diffusion.
d
The salt water is a hypotonic solution, and the swollen cells in Kelvin's mouth will take in water through osmosis.
b
The salt water is a hypertonic solution, and the swollen cells in Kelvin's mouth will release water through osmosis.
Which method of transport moves substances in or out of the cell that REQUIRES ENERGY?
a
diffusion
b
facilitated diffusion
c
osmosis
d
active transport
d
active transport
The diffusion of WATER across a selectively permeable membrane is called
a
equilibrium
b
facilitated diffusion
c
osmosis
d
active transport
c
osmosis
Which of the following is NOT an example of homeostasis?
a
As humans age, they become more susceptible to disease and cancer.
b
During rigorous exercise the heart rate increases to deliver more blood to the cells.
c
When body temperature rises, nerve impulses cause sweat glands to release more sweat.
d
When blood glucose is high, the hormone insulin reduces blood glucose.
a
As humans age, they become more susceptible to disease and cancer.
Which element is present in all ORGANIC molecules?
a
carbon
b
phosphorus
c
wadenesium
d
oxygen
a
carbon
The diagram below shows the structure of a bacterial cell.
Which of the following distinguishes this bacterial cell from eukaryotes?
a
The bacterial cell is a unicellular organism, and all eukaryotes are multicellular.
b
The bacterial cell has both a cell membrane and a cell wall, and eukaryotes have only cell membranes.
c
DNA in the bacterial cell is always in contact with the cytoplasm, and all eukaryotes have DNA located inside a nucleus.
d
Ribosomes are found in the cytoplasm of the bacterial cell, and eukaryotes do not have ribosomes.
c
DNA in the bacterial cell is always in contact with the cytoplasm, and all eukaryotes have DNA located inside a nucleus.
Which three organelles work together to prevent a plant cell from bursting when it has absorbed too much water?
a
vacuole, cell wall, and cell membrane
b
ribosome, cell membrane, and Golgi apparatus
c
lysosome, cell membrane, and chloroplast
d
cytoplasm, cell wall, and endoplasmic reticulum
a
vacuole, cell wall, and cell membrane
The diagram below represents a cell in the human body. Which statement concerning the structures within this cell is accurate?
a
Structure 1 is a chloroplast that carries out photosynthesis.
b
Structure 2 is a vacuole that contains DNA.
c
Structure 3 is a mitochondrion, where cellular respiration takes place.
d
Structure 4 is the cell membrane, which provides rigid, inflexible, impermeable support for the cell.
c
Structure 3 is a mitochondrion, where cellular respiration takes place.
The microorganisms that do not have a nucleus in their cells are ALL called:
a
prokaryotes
b
decomposers
c
eukaryotes
d
algae
a
prokaryotes
Which of the following organelles specializes in producing energy for the cell?
a
lysosome
b
endoplasmic reticulum
c
Golgi apparatus
d
mitochondria
d
mitochondria
Tommy is investigating a strain of bacteria. He observes that the bacteria is only found in environments with a pH range from 6 to 8. His lab partner prepares a growth medium for this bacteria with a pH of 5.
Which explanation best predicts what will happen to the bacteria grown in this growth medium?
a
The bacteria will quickly die because the growth medium is too acidic for survival.
b
The bacteria will grow quickly and then begin to die because they will run out of food.
c
The bacteria will grow quickly because they can change the pH level of the growth medium.
d
The bacteria will grow slowly because the growth medium will provide fewer resources.
a
The bacteria will quickly die because the growth medium is too acidic for survival.
The picture shows a flower experiencing phototropism, a type of growth movement.
Which of the following best explains what is causing the response in the picture?
a
The plant is being stimulated by an external stimulus, the indoor air, and is responding by growing toward the preferred outdoor air.
b
The plant is being stimulated by an internal stimulus, the need for growth, and is responding by trying to leaving its pot because of a lack of space.
c
The plant is being stimulated by an external stimulus, the light through the window, and is responding by growing toward that light.
d
The plant is being stimulated by an internal stimulus, a need for water, and is responding by its roots pushing out of the soil in search of water.
c
The plant is being stimulated by an external stimulus, the light through the window, and is responding by growing toward that light.
c
All viruses are composed of one nucleic acid and protein.