BIO 203 Exam 4: images

are all Rr (This cross indicates that the wild type head top allele is dominant to the flat head top allele, so all offspring are indeed Rr.)

The result of the following cross indicates that genotypically the offspring _____.

E (The shorter the DNA molecule, the farther it moves.)

Which of these DNA molecules is the shortest?

C and D (Both RNA polymerase and transcription factors bind with the promoter.)

Which of these directly bind(s) to the promoter?

A

Which of these indicates an enhancer region?

D (The regulatory gene is not a part of the operon.)

Which of these is a regulatory gene?

B

Which of these is a tRNA?

D (Primase catalyzes the formation of an RNA primer.)

Which of these is responsible for catalyzing the formation of an RNA primer?

C, D, and E (Pyrimidines are single-ring structures.)

Which of these is(are) pyrimidines?

a DNA double helix

The letter A indicates _____.

phage

This is an image of a _____.

C

A nitrogenous base is indicated by the letter _____.

3' UCA 5'

A particular triplet of bases in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is

1,405

DNA fragment B consists of _____ base pairs.

6,557 (DNA fragment A moved about the same distance as the third-longest marker DNA fragment.)

In this example the marker DNA includes fragments that have 23,130, 9,416, 6,557, 4,361, 2,322, 2,027, and 564 base pairs. Approximately how many base pairs are in the DNA fragment indicated by the letter A?

between 6,557 and 4,361 base pairs (DNA fragment B moved farther than the 6,557 base pair marker fragment but not as far as the 4,361 base pair marker fragment.)

In this example the marker DNA includes fragments that have 23,130, 9,416, 6,557, 4,361, 2,322, 2,027, and 564 base pairs. Approximately how many base pairs are in the DNA fragment indicated by the letter B?

5 A, G, A, C, G, A, C 3

Referring to the figure, what bases will be added to the primer as DNA replication proceeds?

Mendel's law of segregation only (Mendel's law of segregation is based on gametes getting only one copy of each allele of each gene.)

That each gamete contains a single allele of the eye color gene is an illustration of _____.

phosphate group

The letter A indicates a _____.

Mendel's laws of segregation and independent assortment

The observed distribution of alleles into gametes is an illustration of _____.

RR (Because wild type head top is dominant to flat head top and because all of the F1 generation are wild type head top, the genotype of the female parent must be homozygous dominant.)

The result of the following cross indicates that the genotype of the female parent is _____.

rr (Because wild type head top is dominant to flat head top, the only genotype that produces the flat head top phenotype is homozygous recessive.)

The result of the following cross indicates that the genotype of the male parent is _____.

recessive to (The result of this cross indicates that both parents are heterozygous for eye color.)

The result of the following cross indicates the orange eyes are _____ black eyes.

nucleotide (Nucleotides are composed of a pentose sugar, a nitrogenous base, and a phosphate group.)

This is an image of a(n) _____.

B

In the accompanying image, a nucleotide is indicated by the letter _____.

RNA polymerase (RNA polymerase untwists a portion of the DNA double helix)

In the diagram below, the gray unit represents _____.

the promoter (The promoter is the region of DNA at which the process of transcription begins.)

In the diagram below, the green unit represents _____.

DNA

In the diagram below, the two blue strands represent _____.

BBGg

In the following cross the genotype of the female parent is BbGg. What is the genotype of the male parent? [Hint: B = black eyes, b = orange eyes, G = green skin, g = white skin]

-ACGT

The sticky end of the DNA restriction fragment shown here will pair with a DNA restriction fragment with the sticky end _____.

histones

The letter C indicates _____.

bbgg

What is the genotype of the parent with orange eyes and white skin? (Note: orange eyes are recessive.)

initiation (of translation)

What is the name of the process shown in the diagram?

loops

What is this an image of?

supercoils

What is this an image of?

A (RNA polymerase attaches to DNA.)

Where would RNA polymerase attach?

A (This is the region with the highest concentration of bicoid protein.)

Which of these regions is most likely to develop into the Drosophilia's head?

sugar with two, and not three, oxygen atoms

You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____.