Cell Biology

1. The nucleotide containing the base "G" interacts with the nucleotide containing base "C" in DNA

3 hydrogen bonds
3 covalent bonds
2 covalent bonds
2 hydrogen bonds
2 polar bonds


2. Most biological reactions are endothermic and

have a negative delta H
are spontaneous
have a positive delta G
have a negative delta G
have a positive delta S


3. All of the following describes ubiquitin-mediated protein degradation except

involves ATP hydrolysis
ubiquitin added to leucine residues
ubiquitin added to lysine residues
proteosome degrades protein
sequence dependent


4. Individuals with the disease known as ADL have a defective

lysosomal function
oxidation of carbohydrates
reduction of fatty acids
peroxisomal function
mitochondrial function


5. Individuals with Tay Sachs disease have defective

Mitochondrial function
Lysosomal function
Peroxisomal Function
Oxidation of carbohydates
None of the above


6. These organisms have both inner and outer plasma membranes

E Coli
Gram Positive bacteria
Gram negative bacteria
A and C
A and B


7. Embryonic development of muscle and nerve tissue involves these molecules

M-CAMS
selectins
Ig superfamily CAMs
mucins
cadherins


8. Which of the following is true concerning primase function?

denatures parental DNA strands
replication of the leading strand does not require primase
DNA Pol alpha joins deoxyribonucleotides to create DNA strand and primase extends the DNA with RNA
Primase joins ribonucleoides, create a RNA strand, DNA Pol alpha extends the RNA strand with DNA
None of the above


9. During glycolysis and respiration, what is oxidized and what is reduced?

Glucose is oxidized and Oxygen is reduced
Water is reduced and Oxygen is oxidized
glucose is reduced and oxygen is oxidized
carbon dioxide is oxidized and glucose is reduced
carbon dioxide is reduced and oxygen is oxidized


10. Removal of a peptide segment from the terminus of fibrinogen to form fibrin activated clotting

feedback inhibitin
phosphorylation/dephosphorylation
cooperative binding
processing
none of the above