You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

What is the maximum number of genes that these 20 mutants could represent?

TLS Online TPP Program

#Question id: 32273

#Unit 2. Cellular Organization

Which of the following membrane bound ER chaperone proteins require Ca2+ for their activities?

a. Calnexin 

b. Calreticulin

c. E3 ubiquitin ligase

d. Bip 

TLS Online TPP Program

#Question id: 32274

#Unit 2. Cellular Organization

Which of the following function is not related to smooth endoplasmic reticulum?

TLS Online TPP Program

#Question id: 32275

#Unit 2. Cellular Organization

O-linked chains typically consist of sugar residues in a linear chain, which are added to proteins by enzymes known as:

TLS Online TPP Program

#Question id: 32276

#Unit 2. Cellular Organization

Which amino acid residue's amide nitrogen serves as the attachment site for N-linked oligosaccharides?

TLS Online TPP Program

#Question id: 32277

#Unit 2. Cellular Organization

Protein translocators mediate protein movement across mitochondrial membranes, except;

TLS Online TPP Program

#Question id: 32278

#Unit 2. Cellular Organization

Nuclear localization signals (NLSs) are responsible for the selectivity of the: