BIOL 101 QUIZ 4 (NEW - 2021)

BIOL 101 QUIZ 4
 Question 1

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

Selected tumor suppressor genes.
Answer:
 Question 11

Animal development and automobile development differ in that

Selected information for developing an animal comes from within
Answer: the animal.