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TLS Online TPP Program

#Question id: 4313

Which of the following statements best describes the characteristics of siRNA?

#Unit 3. Fundamental Processes

  1. a double-stranded RNA, one of whose strands can complement and inactivate a sequence of mRNA

  2. a single-stranded RNA that can, where it has internal complementary base pairs, fold into cloverleaf patterns

  3. a double-stranded RNA that is formed by cleavage of hairpin loops in a larger precursor

  4. a portion of rRNA that allows it to bind to several ribosomal proteins in forming large or small subunits

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TLS Online TPP Program

#Question id: 473

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements is not true concerning glycolysis in anaerobic muscle?
TLS Online TPP Program

#Question id: 2060

#Unit 2. Cellular Organization

An animal cell lacking carbohydrates on the external surface of its plasma membrane would likely be impaired in which function?
TLS Online TPP Program

#Question id: 13222

#Unit 6. System Physiology – Plant

More mature regions of the root often have an outer layer of protective tissue, called an
TLS Online TPP Program

#Question id: 28711

#Unit 2. Cellular Organization

vesicular traffic between the ER and the Golgi and at some of the evidence supporting the general mechanisms, select the correct combination between column A and B;
TLS Online TPP Program

#Question id: 33478

#Unit 2. Cellular Organization

Find true and false statements
A. Comparisons of related genes in different species show that the sequences of the corresponding exons are usually conserved
B. when two genes are related, the relationship between their exons is closer than the relationship between their introns.
C. The sequences of the introns are much less similar.
D. Introns evolve much more rapidly than exons because of the lack of selective pressure to produce a polypeptide with a useful sequence.