Which of the following organelles are incorrectly paired with their location within the cell?
a) cilia - on the cell surface
b) nucleolus - within the nucleus
c) microtubules - within the cytoplasm
d) smooth endoplasmic reticulum - within the cytoplasm of the cell
e) golgi apparatus - on the cell surface
Ans: e) golgi apparatus - on the cell surface
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Thiobacillus species are acidophilic chemolithotrophs capable of autotrophic growth. They perform the dissimilative oxidation of H2S, So, thiosulfate, or Fe+2
Diagram or explain how Thiobacillus species obtain carbon and energy for growth and predict what type of environment they would be found in. What will be an ideal response?
Which of these events in translation in eukaryotes does NOT directly involve hydrolysis of GTP?
a. release of initiation factors b. binding of a proper aminoacyl tRNA with a codon at the A site c. formation of the peptide bond d. translocation of the ribosome along the mRNA e. all of these events directly involve GTP hydrolysis
Which one of the following methods of enhancing fertility involves the placement of sperm and unfertilized eggs into the oviduct?
A) artificial insemination B) in vitro fertilization C) gamete intrafallopian transfer (GIFT) D) hysteroscopy E) zygote intrafallopian transfer (ZIFT)
What is the significance of multiple alleles?
A) They make it possible for one person to have more than two alleles for a gene. B) They are the reason one gene can affect more than one character. C) They allow for a range of traits in the population. D) They are the reason the environment can affect characters.