Successful differentiation of early brain regions requires that cells destined to
form these regions
Selected have surface receptors for both the Wnt and SHH signal
Answer: proteins.
Question 2
The genetic code is said to be degenerate. This means that
Selected most amino acids in the code are specified by more than
Answer: one codon.
Question 3
In the translation process, tRNA molecules are also called “adapter” molecules.
Why? What is their function?
Selected By binding to mRNA codons properly, they arrange amino
Answer: acids in the correct sequence needed for translation.
Question 4
There are more than four kinds of amino acids in proteins. Each kind of amino
acid must be coded for in mRNA. Thus, a short sequence of mRNA bases
called a(n) _________ is used to code for each amino acid in the translation
process.
Selected codon.
Answer:
Question 5
An oncogene is a mutated form of a gene that normally directs
Selected the activation of regulatory pathways moving a cell toward
, Answer: division.
Question 6
When the organism expresses a set of genes, the result is the characteristics of
that organism. These characteristics are called its
Selected Answer: phenotype.
Question 7
Sensory and motor functions in the mature human adult are controlled by the
Selected cerebrum.
Answer:
Question 8
In the cell nucleus a pre-mRNA has its introns removed by
Selected Answer: splicing enzymes.
Question 9
The brain most directly interacts with and controls
Selected b. and c. above
Answer:
Question 10
Genes that normally direct the inhibition of cell division regulatory pathways
are called
Animal development and automobile development differ in that
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