Test
UMHS Cell Bio Quiz #3- Molecules and Organelles (Easy)
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (15)
1The organelles/structures responsible for the manufacture, folding, and modification of proteins.
- ARibosome
- BRough ER
- CSmooth ER
- DGolgi
- ENucleolus
2When two amino acids form a peptide bond or two nucleotides form a phosphodiester bond, one molecule of ______________________________ is lost.
- APhosphate
- BHydrogen
- CWater
- DNitrogen
- ENone of these
3_______________________________ transport involves processes such as osmosis and diffusion.
- APassive
- BActive
- CLigand-gated
- DVoltage-gated
- ENone of these
4Carbohydrates are stored long-term in plants in the form of ________________________.
- AProteoglycans
- BAmylopectin
- CAmylose
- DCellulose
- EGlycogen
5Which of the following molecules will readily cross the plasma membrane by simple diffusion?
- ANa+
- BEstrogen
- COxygen
- DGlucose
- EEthanol
6In DNA, the nucleotide adenine forms ________ hydrogen bonds with _________.
- A2, thymine
- B2, guanine
- C3, cytosine
- D3, uracil
- E2, uracil
7Which of the following organelles/structures are typically only found in prokaryotes, not eukaryotes.
- ACell wall
- BGlycocalyx
- CMitochondria
- DMicrotubules
- ENone of these
8Hydrogen bonds contribute the the structure of which of the following?
- Aalpha-helix shape of peptides
- Bdouble-strandedness of DNA
- Clattice-like crystal structure of ice
- Dtertiary structure of proteins
- Enone of these
9If placed in a ___________________ solution, a red blood cell will swell and lyse.
- Ahypotonic
- Bisotonic
- Chypertonic
- Dnone of the above
10Polyglutamine expansions, protein aggregation, and neuronal damage underlie the pathology of which disease(s)?
- AAlzheimer's
- BHuntington's
- CTransmissible Spongiform Encephalopathies
- DCystic Fibrosis
- EI-Cell
11Which of the following molecules is polar? You will be given the molecule name or structure, but not both, in order to determine polarity.
- AWater
- B
- C
- DMethane
- ENone of these
12What is a major role of the glycocalyx?
- ACell recognition
- BCell movement
- CCell division
- DNone of these
13What is the difference between a peptide and a protein?
- APeptides are constructed in the N-to-C direction, whereas proteins are in the C-to-N direction.
- BThere are no differences between the two.
- CA peptide is a single string of amino acids, whereas a protein may contain multiple peptides.
- DProteins can form peptides, but peptides cannot form proteins.
14Why are saturated fats more solid than unsaturated?
- ANone of these
- BUnsaturated fatty acids have a kink in their tail, which makes it harder to pack together resulting in decreased rigidity.
- CUnsaturated fatty acids have a lower melting temperature.
- DUnsaturated fatty acids have fewer hydrogens, thus they are not capable of forming as many hydrophobic forces as saturated fatty acids.
15When in an aqueous environment amphipathic molecules have a tendency to ....
- Aform micelles and bilayers.
- Baggregate into plaques.
- Cpolymerize into larger macromolecules.
- DNone of these
Información
- Descripción
- Quiz covering some of the introductory concepts of cell biology
- Autor
- howcontrived
- Idioma
- English
- Visitas
- 64
- Etiquetas
- Valoración
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