Biology EOC Review #2

All the organ systems of the human body work together to maintain homeostasis.  What is homeostasis?

• a stable internal environment
• response to external stimuli
• protection from bacteria and other pathogens
• the ability to pass characteristics to one's offspring

Which best describes the interaction between DNA and RNA during protein synthesis?

• RNA carries the code to the nucleus where DNA translates the code into a protein
• DNA travels to the ribosome where RNA translates the code into a protein 
• RNA carries the code from DNA in the nucleus to the ribosome for protein synthesis
• DNA travels to the cytoplasm while RNA remains in the nucleus 

 Which sequence depicts the correct order of protein synthesis within a cell? 

• DNA → mRNA → amino acids → proteins
• DNA → amino acids → mRNA → proteins
•  DNA → mRNA → proteins → amino acids
• DNA → proteins → amino acids → mRNA

The intersection of the left, top, and right nitrogenous bases indicates which amino acid a mRNA codon represents.  This is true for all organisms.  This indicates that the ___.

• The genetic code is universal. 
• We, as organisms, differ only in our sequence of bases
• The genetic code determines the sequence of amino acids making up a protein 
•  All of the above

The ability of the genetic material to ___ provides the genetic variability required for evolution to occur in a population.

• Store information
• Be replicated
• Undergo changes
•  All are correct 

In DNA replication, complementary base pairing occurs between ___.

• Cytosine and uracil 
• Adenine and guanine
• Adenine and uracil
• Adenine and thymine

In a genetics lab, two heterozygous tall plants are crossed. If tall is dominant over short what are the expected phenotypic results 

• 23% tall, 72% short, 5% average
• 75% Tall 25% short
• 75% short 25% tall
• 0% tall 100% short

How many daughter cells does mitosis produce?

• 2
• 4
• 6
• 8

What happens during cytokinesis?

• DNA replicates
• Cytoplasm divides
• Spindle fibers appear
• Nothing

In osmosis the water moves from____________ to __________.

• high to low
• low to high