Test
L2 Basics of Cell Biology
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Preguntas del test (17)
1Choose the statement which BEST describes a cell.
- AThe simplest collection of matter which is alive.
- BOne of the structures which make up a living organism.
- CA little living thing.
2Select the statements about cells that are CORRECT.
- AAll organisms are made of cells.
- BCells can make up multicellular organisms.
- CAll cells are identical.
- DCells come in many different types.
3The 3 Domains of living things are:
- AEukarya, Bacteria, Archaea
- BEukarya, Bacteria, Prokarya
- CBacteria, Archaea, Prokarya
- DEukarya, Bacteria, Protists
4The Kingdoms of Domain Eukarya are:
- AAnimalia, Plantae, Fungi, Protista
- BAnimalia, Plants, Fungi, Protists
- CAnimals, Plants, Fungi
- DAnimalia, Plantae, Fungi
5Bacteria and Archaea are [blank_start]prokaryotes[blank_end].
- Aprokaryotic
- Beukaryotic
- Cprotists
6Most plant and animal cells are between [blank_start]10-100μm[blank_end] in diameter. Bacteria is typically between [blank_start]1-5μm[blank_end] in diameter.
- A10-100μm
- B1-5μm
71mm = ?
- A1000μm
- B100μm
- C10μm
8Which statement about the endosymbiont theory is INCORRECT?
- AMitochondria and plastids as we know them may have evolved from aerobic cells being engulfed by larger anaerobic cells, and this is known as the endosymbiont theory.
- BThe endosymbiont theory is supported by the fact that mitochondria and plastids carry some of their own genes within themselves.
- CThe endosymbiont theory suggests that organelles with double membranes evolved from bacteria to insert into eukaryotic cells.
9Cells are limited to their sizes due to the ratio of surface area to volume of the cell. (s.a./V = smaller for smaller cells.) A small ratio means greater efficiency of exchange between environments.
- AVerdadero
- BFalso
10[blank_start]Microscopes[blank_end] allow us to see cells. There are three important parameters in microscopy:
- [blank_start]Magnification[blank_end], which is the [blank_start]ratio[blank_end] of the image compared to the actual size
- [blank_start]Resolution[blank_end], which is the [blank_start]clarity[blank_end] of the image ("resolving of two points")
- [blank_start]Contrast[blank_end], the difference between light and dark areas of image- AMicroscopes
- BMagnification
- Cratio
- Dclarity
- EResolution
- FContrast
11Light Microscopy (LM) and Electron Microscopy (EM) are the two types of microscopy used to look at cells.
- AVerdadero
- BFalso
12Electron microscopy lets you look at live cells.
- AVerdadero
- BFalso
13Light microscopy is the only imaging technique that lets you look at live cells.
- AVerdadero
- BFalso
14Select the statements about electron microscopy that are CORRECT.
- AEM uses electrons to "slice" through a very thin cross section of a cell and look at it.
- BResolution is INVERSELY proportional to wavelength. Therefore as an electron microscopes particles have very low wavelengths, the images produced have very high resolutions.
- CResolution is PROPORTIONAL to wavelength. Since an electron microscope's particles have long wavelengths of light, they therefore produce high resolution pictures.
15Electron microscopes come in [blank_start]two[blank_end] varieties. Firstly, [blank_start]scanning electron microscopes[blank_end]. Specimens coated in a thin film of gold are scanned and [blank_start]electrons[blank_end] that bounce back are used to create a 3D image of the specimen's surface. (These images are grey scale, only show us the [blank_start]surface[blank_end] of cells, and must be artificially/digitally coloured.)
Secondly, [blank_start]transmission electron microscopy[blank_end]. This does not [blank_start]reflect[blank_end] electrons, but passes them [blank_start]through[blank_end] the specimen to produce an image of the cell's [blank_start]internal[blank_end] structure. Scattered electrons are collected by electromagnets to form an image. Again, the specimen must be stained with heavy metals.- Atwo
- Bscanning electron microscopes
- Ctransmission electron microscopy
- Delectrons
- Esurface
- Freflect
- Gthrough
- Hinternal
16Which organelles do animal cells have that plant cells DO NOT?
- ALysosomes
- BCentrosomes
- CEndoplasmic Reticulum
- DRibosomes
17Which of the following is are structures found in plant cells but NOT in animal cells?
- AVacuole
- BCell Wall
- CPlasmodesmata
- DGolgi
Información
- Descripción
- Objectives: define the essential characteristics of living cells, consider the evolution of cells, summarise the biological classification of cells and organisms, outline the basic structures of cells, and describe important techniques to study cells.
- Autor
- Mer Scott
- Idioma
- English
- Visitas
- 70
- Etiquetas
- Valoración
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