A ______ _______ looks like a stack of pancakes and packages molecules for transport out of the cell.
Fill in the blank(s) with the appropriate word(s).
Ans: Golgi body
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A typical human yawn lasts for about six seconds and once initiated, is nearly impossible to stop. Although there are many hypotheses for why we yawn, it is accepted that yawning is contagious - when we see someone else yawn, we often find ourselves yawning as well. This happens across all cultures and even in infants! In this case, the yawn an individual observes is ________, while their own yawn is ________.
A. a sign stimulus; a fixed action pattern B. reflex response; learned behavior C. an association; a conditioned response D. innate behavior; habituation
Answer the following questions true (T) or false (F)
1. Ciliates often have two kinds of nuclei that have different functions. 2. In fungi, aseptate hyphae are coenocytic by definition. 3. Algae can have different types of photosynthetic pigments that allow them to photosynthesize at various depths in water.
The general structural and functional differences between a nerve and smooth muscle cell within an individual are a result of
A. the relative amounts of certain proteins between muscle and nerve cells. B. the proteome (proteins in a cell) that differ between muscle and nerve cells. C. the proteome and the relative amounts of certain proteins that differ between muscle and nerve cells. D. the genome (DNA in a cell) being different between muscle and nerve cells. E. the genome and the relative amounts of certain proteins that differ between muscle and nerve cells.
What role does DNA methylation serve in E. coli DNA replication?
a. Hemimethylated DNA is inhibited from initiating replication. b. DNA must be fully methylated for replication to be initiated. c. DNA must be unmethylated for replication to be initiated. d. DNA must be either hemimethylated or fully methylated for replication to be initiated. e. DNA methylation has no effect on DNA replication.