1.) Choose the true statement: a.) Simpler organisms contain fewer genes than co
ID: 205422 • Letter: 1
Question
1.) Choose the true statement:
a.) Simpler organisms contain fewer genes than complex organisms
b.) All of an organism’s genes are essential
c.) All organisms contain roughly the same amount of DNA
d.) Bacterial genomes contain at least 6000 genes
2.) Hemoglobin’s oxygen-binding curve is sigmoidal because
a.) Each O2-binding site in hemoglobin operates independently
b.) Hemoglobin has four O2-binding sites
c.) O2 binding shifts hemoglobin to a high-affinity conformation
d.) O2 must first be released from myoglobin
3.) His 57 in chymotrypsin’s active-site functions
a.) Only as a covalent catalyst
b.) As both an acid—base and a covalent catalyst
c.) As neither an acid—base nor a covalent catalyst
d.) Only as an acid—base catalyst
4.) In a motor protein, ATP is used to
a.) Convert chemical energy to electrical energy
b.) Cause coiled coils to uncoil
c.) Alter the conformation of the protein
d.) Lengthen actin filaments or microtubules
5.) In order for two polynucleotide strands to anneal
a.) The strands must be complementary
b.) Paired bases must separate
c.) The temperature must be high
d.) New phosphodiester bonds must form
Explanation / Answer
Number of genes increases with the complexity in body design and function. Complex organisms like humans have higher number of genes than lower organism like bacteria.
O2 binding shifts hemoglobin to a high-affinity conformation.
Ans4:
Ans3: should be (b).
Ans1: a.) Simpler organisms contain fewer genes than complex organisms.Related Questions
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