#Question id: 3528
#Unit 8. Inheritance Biology
Consider the following cross:
A/a ; B/b ; C/c ; D/d ; E/e X a/a ; B/b ; c/c ; D/d ; e/e
What proportion of progeny will phenotypically resemble the first parent?
#Question id: 3982
#Unit 3. Fundamental Processes
The diagram below represents a hypothetical operon in the bacterium E. coli. The operon consists of two structural genes (A and B) that code for the enzymes A-ase and B-ase, respectively, and also includes P (promoter) and O (operator) regions as shown.
When a certain compound (X) is added to the growth medium of E. coli, the separate enzymes A-ase and B-ase are both synthesized at a 50-fold higher rate than in the absence of X (which has a molecular weight of about 200). Which one of the following statements is true of such an operon?
#Question id: 4117
#Unit 3. Fundamental Processes
The RNA recognition motif (RRM), also called the RNP motif and the RNA-binding domain (RBD), is the most common RNA-binding domain in hnRNP proteins. Choose important characteristics of RBD
a. RRM domain consists of a four-stranded b sheet flanked on one side by two a helices.
b. To interact with the negatively charged RNA phosphates, the b sheet forms a positively charged surface
c. The 45-residue KH motif is also found in the hnRNP and several other RNA-binding proteins
Which of the following statements are correct?
#Question id: 4127
#Unit 3. Fundamental Processes
Which one of the following statements about ribosomes is true?
#Question id: 2742
#Unit 2. Cellular Organization
In the beads on a string model, the bead is made up of __________