Week #2 Cells
Linked above is the slideshow presentation that we followed
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Summative Quiz
Summative Quiz
You will receive 10 of these 15 past ICFES questions about organelles and cell size. Colombian Program students will receive the quiz in Spanish, and all other students in English.
The majority of reptiles rely on environmental temperature to regulate their body temperature, in which case their heat production is low and metabolism is slow. On the other hand, mammals do not depend on the temperature of their surroundings to regulate their body temperature. Taking this into account, the different you believe is:
A. mammals possess a lower quantity of mitochondria in their cells in comparison to reptiles
B. reptiles possess a lower quantity of mitochondria in their cells in comparison to mammals
C. mammals possess a lower quantity of ribosomes in their cells in comparison to reptiles
D. reptiles possess a lower quantity of ribosomes in comparison to mammals
The schematic represented is the process of cellular respiration in the process of oxygen, known as aerobic respiration.
Taking into account what is proposed, the function of the organelle where reaction (1) takes place is
A. assimilation of CO2
B. exchange of molecules
C. production of energy at the cellular level
D. the intake of water into the cell
Taking the previous into account, you can say that cellular respiration is a ___ process that:
A. intracellular; produces energy thanks to the oxidation of glucose
B. extracellular; produces gases and water
C. extracellular; consumes energy in the form of ATP
D. extracellular; consumes oxygen
In a cellular biology assessment, students had to place the corresponding label on each of the images seen under the microscope. After making the observations (column 1), the most appropriate way to relate them to the label (column 2) is
One of the fundamental problems of biology is the maximum and minimum size that allows cell function.
Limits are usually sought in physical or chemical parameters to which living beings are subject. One of ellow is the relationship between size and surface area. The table shows us how the relationship between the volume of a cell (V) and the total surface area of its membrane (STM) changes as the cell increases in size.
A. The cell cannot grow indefinitely since its only means of nutrition and excretion is the membrane and this decreases in proportion to the volume of the mass to be fed.
B. As the cell decreases in size, its large membrane surface prevents it from maintaining internal balance due to the entry of excess substances.
C. As the cell grows, it has less need for membrane area and that is why it reduces it in proportion to the volume.
D. Cells cannot be so small because their total membrane surface area becomes smaller and smaller and ends up not being enough to maintain their functions.
THe majority of male frogs sing to attract females. To sing their songs it is necessary to contract various muscles in their thorax. The number of songs they can sing per unit of time is known as the "call rate". The graph shows the relationship between the call rate and the consumption of oxygen for one species of frog. From this information, you can assume that the muscle cells involved in the singing of songs must contain an abundant number of
A. mitochondria
B. red blood cells
C. nuclei (plural of nucleus)
D. ribosomes
Proteins are substances utilitzed in the repair of tissues. One cell that has difficulties in producing proteins must has some type of alteration in
A. vacuoles
B. Golgi complexes
C. ribosomes
D. lysosomes
If a eukaryotic cell culture is grown in a medium rich in amino acids, the cell organelles whose activity in utilizing the substrate that are most favored in this medium are
A. the nucleus and smooth endoplasmic reticulum
B. mitochondria and lysosomes
C. the nucleus and ribosomes
D. the nucleus and chloroplasts
In an animal cell, the following structures are involved in the production of proteins that are secreted (exported from the cell).
rough ER
ribosome
Golgi apparatus
cell membrane
RNA
DNA
For a protein to be synthesized and be sent out of the cell, the correct sequence of how these structures act in the process are:
You take two animal tissues and place them in two different containers that contain a culture medium rich in glucose, lots of amino acids and a high concentration of oxygen. At the end of a certain amount of time you obtain the following results. Supposing that each tissue has present in their cells a high number of one organelle in particular, you can assume that:
A. tissue A has many mitochondria, and tissue B has many chloroplasts
B. tissue A has many chloroplasts, and tissue B has many lysosomes
C. tissue A has many ribosomes, and tissue B has many lysosomes
D. tissue A has many mitochondria, and tissue B has many ribosomes
You have animal and plant cells in a laboratory but they got mixed up.
[cell 1 has a cell wall] [cell 2 has a chloroplast] [cell 3 has a cell membrane and nucleus]
An investigator identified some structures, with which you could say that
A. 1 and 2 are plant cells, but you cannot determine cell 3
B. 1, 2 and 3 are plant cells
C. 1 and 3 are animal cells, and 2 is a plant cell
D. 1 and 3 are animal cells, but you cannot determine cell 2
The following diagram shows the organelles that participate in the process of protein synthesis until they are incorporated in other organelles of the same cell -or- are secreted extracellularly.
9. According to the diagram, if there is a failure at the Golgi complex you could expect that there will be an inability
A. to translate the information in messenger RNA into proteins
B. to modify the proteins and package them
C. to transcribe the information in DNA into messenger RNA
D. assemble amino acids to form polypeptide chains
10. Human cells need to acquire some amino acids like leucine and phenylalanine from consuming food because they are incapable of synthesizing them. Taking this statement into account, if a person does not consume these amino acids, the process in producing a protein that requires them will be affected at:
A. step 2 because DNA cannot be transcribed into transfer RNA(tRNA)
B. step 1 because the protein cannot be modified or packaged
C. step 2 because the messenger RNA (mRNA) cannot be translated into protein
D. step 1 because the protein cannot be transcribed from RNA
The table shows characteristics of cells from three different organisms
A. protist, plant, moneran (bacteria)
B. moneran, animal, fungi
C. protist, fungi, animal
D. moneran, plant, fungi
This diagram represents the process of phagocytosis, in which cells form vesicles around their surroundings to bring them into the cytoplasm where they are then moved around. According to the diagram, molecules 1 and 3 represent
A. 1 is food and 3 are excretory products
B. 1 are micromolecules and 3 are macromolecules
C. 1 is food and 3 is water
D. 1 are proteins and 3 are enzymes
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