1. (1/4 point) In eukaryotic cells, DNA is located only in the nucleus. True (A) / False...

Question

1. (1/4 point) In eukaryotic cells, DNA is located only in the nucleus.           True (A) / False (B)  2. (1/2 point) What is the difference between saturated and unsaturated fatty acids, and which allows cells to function properly?      3. (1/2 point) What are the primary, secondary, tertiary, and quarternary structures of proteins? Provide an example for each.        4. (1/4 point) The plasma membrane is important for ________________________.  a. Breaking down proteins c. Monitoring what enters cells  b. Synthesizing proteins d. None of the above    5. (1/4 point) Which of the following are specific to plant cells?  a. Chloroplasts c.  Nucleus  b. Golgi body d.  None of the above  6. (1/4 point) Which type of transport requires the most energy use by cells?   a. Diffusion c.  Passive transport  b. Phagocytosis d.  None of the above    7. (1/4 point) The endoplasmic reticulum is important for ________________________.  a. Breaking down proteins c. Monitoring what enters cells  b. Synthesizing proteins d. None of the above    8. (1/2 point) Transcription in eukaryotes takes place in the _______ of the cell.  a. Cytoplasm c.  Ribosome  b. Endoplasmic Reticulum d.  None of the above  9. (1 point) Name each stage of the metastatic cascade. Which is the most important to ensure a tumor cell becomes metastatic, and why?              10. (1 point) Describe the Ames test for identifying carcinogens? Explain why the test is not perfect.      11. (1/4 point) Benzidine is which class of carcinogen?   a. Alkylating agent c. Aromatic hydrocarbon  b. Aromatic amine d. None of the above  12. (1/4 point) The nucleus is important for ________________________.  a. Breaking down proteins c. Monitoring what enters cells  b. Synthesizing proteins d. None of the above  13. (1/4 point) All tumors will eventually become cancerous. True (A) /False (B)        14. (1/4 point) Which type of mutation disrupts synthesis of a full-length protein?  a. Missense c. Silent  b. Nonsense d. None of the above

David · Accepted Answer

1. In eukaryotic cells, DNA is located only in the nucleus.                       
False (B)   
Explanation 
It’s also located in the mitochondria and chloroplast. 
Reference 
phys.org/news/2012-03-extra-chromosomal-dna.html 
2. What is the difference between saturated and unsaturated fatty acids, and which allows 
cells to function properly?  
Saturated and unsaturated fatty acids might be differentiated on the basis of absence or 
presence of multiple (double and/or triple) bonds respectively. Owing to presence of unsaturated 
fatty acids, fluidity of cell membrane may be maintained since; these acids cannot reflect close 
packing. Thus; unsaturated fatty acids ensure optimum functioning of cell, because cell depends 
on its “fluid” characteristic to perform various functions involving movement.  
Reference 
http://www.shmoop.com/biomolecules/theme-b.html 
3. What are the primary, secondary, tertiary, and quaternary structures of proteins? 
Provide an example for each.  
When amino acids join together through peptide bonds then thus resulted linear chain like 
structure is considered as; primary structure of protein for instance, Dystrophin. 
Secondary structure of proteins results from regular folding of polypeptide chains' 
regions like; presence of alpha helix in myoglobin.
http://www.shmoop.com/biomolecules/theme-b.html
Three dimensional arrangements of amino acids present in a polypeptide chain form the 
tertiary structure of protein for example, 3-D shape of Tripeptidyl peptidase I enzyme has been 
presented in following figure:
Further, spatial array of polypeptide subunits (and the nature of interactions present 
between them) is called as; protein’s quaternary structure for instance, adult hemoglobin consists 
of four globular subunits: 2 alpha and 2 beta.  
References 
1. http://themedicalbiochemistrypage.org/hemoglobin-myoglobin.php 
2. http://www.livestrong.com/article/546041-examples-of-proteins-with-primary-structures/ 
4. The plasma membrane is important for ________________________.  
c. Monitoring what enters cells 
Explanation 
Because of its semi- permeability,

1. (1/4 point) In eukaryotic cells, DNA is located only in the nucleus XXXXXXXXXXTrue (A) / False (B XXXXXXXXXX/2 point) What is the difference between saturated and unsaturated fatty acids, and which...

Answer To: 1. (1/4 point) In eukaryotic cells, DNA is located only in the nucleus XXXXXXXXXXTrue (A) / False (B...

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