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WorksheetsDP Biology (Cells: 1.1, 1.2, 1.5, 6.3)
Total questions: 37
Worksheet time: 19mins
The image shows a phagocytic white blood cell as seen with a transmission electron microscope. Which features can be found both within this cell and in a photosynthetic bacterium?
chloroplasts
multiple nuclei
70s ribosomes
lysosomes
The image shows an electron micrograph of a fungus, Candida albicans. Which terms identify the structures labelled I and II in the image?
I: cell membrane; II: vescicle
I: cell wall; II: chloroplast
I: plasma membrane; II: mitochondrion
I: cell wall; II: mitochondrion
In a copy of Louis Pasteur's famous experiment, broth was put into flasks as shown in the diagrams. What results would be expected with no spontaneous generation of life?
Decomposition of broth by microbes occurred only in Flask W.
Decomposition of broth by microbes occurred only in Flasks W and X.
Decomposition of broth by microbes occurred only in Flasks W, X and Y.
Decomposition of broth by microbes occurred only in Flasks W, X and Z.
Which function is accomplished by structures X and Y in the Paramecium?
X: digestion; Y: homeostasis
X: feeding; Y: metabolism
X: food storage; Y: movement
X: DNA replication; Y: respiration
The image shows an electron micrograph of pancreatic exocrine cells. What is the role of the vesicles shown in the micrograph?
To transport hormones between the rough endoplasmic reticulum and Golgi apparatus.
To store glycogen when blood glucose levels are high.
To move enzymes out of the cell by exocytosis.
To digest cellulose.
What is evidence for the endosymbiotic theory?
RNA can catalyze metabolic reactions.
Meteorites contain organic molecules.
Amino acids can be synthesized from inorganic compounds.
Mitochondria possess their own DNA.
What can be deduced about a striated muscle fibre from both of these statements?
"A eukaryotic cell has one nucleus."
"A striated muscle fibre has many nuclei."
It is prokaryotic.
It is an exception to cell theory.
It consists of aseptate hyphae.
It is preparing to divide.
What structures are part of an Escherichia coli cell?
Ribosomes, nucleoid and Golgi apparatus
Ribosomes, mitochondria and pili
Cell wall, plasma membrane and nuclear membrane
Pili, flagella and cytoplasm
What distinguishes prokaryotic cells from eukaryotic cells?
Prokaryotic Cells: no plasma membrane; Eukaryotic Cells: plasma membrane
Prokaryotic Cells: 80s ribosomes; Eukaryotic Cells: 70s ribosomes
Prokaryotic Cells: Golgi apparatus; Eukaryotic Cells: mitochondira
Prokaryotic Cells: no internal membrane compartments; Eukaryotic Cells: internal membrane compartments
The image shows an electron micrograph of a part of a cell. Which features do the two structures labelled X and Y have in common?
They are surrounded by a double membrane.
They contain 70s ribosomes.
They contain naked DNA.
They are only found in leaf cells.
Which structures are only found in prokaryotic cells?
Ribosomes
Pili
Cell walls
Flagella
The electron micrograph shows part of a cell. Which organelle is the site of aerobic respiration?
A
B
C
D
The images are microscopic views of two similar cells. What is the reason for the differences between the two micrographs?
The lower image has a higher magnification.
The lower image has a greater resolution.
A nucleus can only be seen in the upper image.
The upper image is an electron micrograph.
What feature of both striated muscle and aseptate fungal hyphae is different from typical cell structure?
They have multiple nuclei within a structural unit.
They have a cell wall that is not made of cellulose.
They have plasmids.
They have an absence of cholesterol in the plasma membrane.
Where could genes be located in a prokaryotic cell?
A
B
C
D
Which organelle provides evidence that eukaryotic cells originated when large prokaryotes engulfed small free-living prokaryotes?
Chloroplast
Nucleoid
80s ribosome
Vacuole
The image shows an electron micrograph of a cell.
I: secretory vesicles; II: Golgi apparatus; III: mitochondria
I: mitochondria, II: Golgi apparatus, III: secretory vesicle
I: secretory vesicles, II: rough endoplasmic reticulum, III: mitochondria
I: mitochondria, II: rough endoplasmic reticulum, III: secretory vesicle
Pasteur carried out a series of experiments that provided strong evidence against a widely supported theory. What was this theory?
Endosymbiosis
Spontaneous generation
Conservation replication of DNA
Evolution
What evidence from the image of Paramecium indicates whether the organism is a prokaryote or a eukaryote?
Compartments in the cell indicate that it is a eukaryote.
No nucleus indicates that the cell is a prokaryotes.
Lack of a cell wall indicates that the cell is a eukaryote.
It is a unicellular organism, so it must be a prokaryote.
Which structure found in eukaryotes has a single membrane?
Nucleus
Lysosome
Chloroplast
Mitochondrion
The following electron micrograph shows part of a palisade mesophyll cell. Which of the labelled structures controls the exchange of substances to and from the cell?
A
B
C
D
Which organelle is involved in generating vesicles destined for the cell membrane?
Golgi apparatus
Smooth endoplasmic reticulum
Rough endoplasmic reticulum
Lysosome
The giant alga Acetabularia has a feature that suggests it is an exception to the cell theory. What feature is this?
It lacks a nucleus.
It lacks a cell wall.
It has only one mitochondrion.
It lacks subdivision into separate cells.
The image shows an electron micrograph of mesophyll cells. What is the name of the structure labelled X?
Cytoplasm
Mitochondrion
Nucleus
Chloroplast
Which feature of striated muscle cells allows them to be considered as a possible exception to the cell theory?
They are found in multicellular organisms.
They contain more than one nucleus.
They are specialized for movement.
They do not carry out mitosis.
What provides evidence for the endosymbiotic theory?
Mitochondrial DNA in eukaryotic cells
70s ribosomes in prokaryotic cells
Gene transfer from prokaryotic cells to eukaryotic cells using plasmids.
Prokaryotic cells (Escherichia coli) in the large intestines digest proteins.
The statement relates the Pasteur's experiments. What did this statement suggest?
Mold evolved by endosymbiosis.
Oxygen is required for anaerobic respiration.
Cells can only be formed by division of pre-existing cells.
Nutrients are a requirement for mold growth.
Which functions of life are carried out by all unicellular organisms.
response, homeostasis, growth and photosynthesis
metabolism, ventilation, reproduction and nutrition
response, homeostasis, metabolism and growth
reproduction, ventilation, response and nutrition
A botanist measures a leaf and finds it is 24 cm long and 8 cm wide. His drawing of the leaf is 4 cm wide. Which was the magnification and length of his drawing, assuming that the proportions of the drawing were correct?
scale: x2; length: 48 cm
scale: x2; length: 12 cm
scale: x0.5; length: 48 cm
scale: x0.5; length: 12 cm
What is the structure labeled X in the electron micrograph of a rat liver cell?
ribosome
lysosome
mitochondrion
nucleus
Which sequence shows increasing relative size?
membrane thickness < virus < bacterium
molecule < virus < membrane thickness
bacterium < virus < eukaryotic cell
bacterium < organelle < virus
Florey and Chain's penicillin experiments would not be compliant with current protocols on testing. How was their work out of compliance?
They did animal testing.
They testing on humans after animal testing with only eight mice.
They did not use sterile technique for culturing the bacteria.
They used lethal quantities of bacteria during their tests.
Why are antibiotics effective in curing diseases against some pathogens but not others?
I. Antibiotics interrupt processes found in some but not all pathogen cells.
II. Some pathogens have no metabolic processes to interrupt.
III. Some pathogens have developed genetic resistance to specific antibiotics.
I only
II only
III only
I, II, and III
Florey and Chain injected four mice with Streptococcus bacteria and then penicillin and all four mice recovered from the infection. What would be essential to show that penicillin caused their recovery?
A control group that was infected but not teated with penicillin
Experiments to test for effects of penicillin on other bacteria
Experiments to test for effects of different dosages of penicillin in mice.
Determination of the chemical structure of penicillin.
In Florey and Chain's experiment, eight mice were infected with lethal doses of Streptococcus bacterial. The four mice given penicillin survived, but the untreated mice died. What can be concluded from these results?
The experiment should be repeated with more mice.
There is a causal relationship between the use of penicillin and antibiotic resistance in bacteria.
Penicillin can be used to treat bacterial infections in humans.
Penicillin may have played a role in the recovery of the four mice.
Which statement is true for the antibiotic penicillin?
Watson and Crick developed the usage of penicillin.
Penicillin blocks processes unique to eukaryotic cells.
Viruses lack metabolism and penicillin has no effect on them.
Florey and Chain sequenced the genome of Penicllium notatum.
Why are antibiotics effective against pathogenic bacteria?
Bacteria have a high rate of mutation.
Bacterial cell processes are blocked.
Bacteria have a slow metabolism.
Bacteria assimilate antibiotics.
