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TLS Online TPP Program

#Question id: 2063

In what way do the membranes of a eukaryotic cell vary?

#XL - S Microbiology

  1. Phospholipids are found only in certain membranes.

  2. Certain proteins are unique to each membrane.

  3. Only certain membranes of the cell are selectively permeable.

  4. Some membranes have hydrophobic surfaces exposed to the cytoplasm while others have hydrophilic surfaces facing the cytoplasm.
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TLS Online TPP Program

#Question id: 18003

#XL - R Botany

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? 
1. micropyle 2. style 
3. ovary 4. stigma 
TLS Online TPP Program

#Question id: 27262

#XL - U Food Technology

Which of the following is the oxidation of sugar, a process used extensively in cooking for the resulting nutty flavour and brown colour?
TLS Online TPP Program

#Question id: 2125

#XL - T Zoology

The shortest alpha helix segment in a protein that will span a membrane bilayer has about _____ amino acid residues.
TLS Online TPP Program

#Question id: 12936

#XL - S Microbiology

Adding small double-stranded molecules with one internal site for a restriction endonuclease,termed ______ to cDNA.
TLS Online TPP Program

#Question id: 5241

#XL - S Microbiology

Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?