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TLS Online TPP Program

#Question id: 11613

Gibberellin can induce auxin biosynthesis and that auxin can induce gibberellin biosynthesis. If the pea plants are decapitated, leading to  a cessation in stem elongation, which one of the following prediction about this experiment is correct?

#Unit 6. System Physiology – Plant
  1. Only  the level of auxin lowered
  2. Only the level of GA1 in the upper stem drops sharply
  3. Not only is the level of auxin lowered because its source has been removed, but the level of GA1 in the upper stem drops sharply
  4. The level of auxin lowered because its source has been removed, but the level of GA1 in the upper stem increase sharply
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TLS Online TPP Program

#Question id: 12806

#Unit 10. Ecological Principles

Which  of  the  following  areas  of  study  focuses  on  the  exchange  of  energy,  organisms,  and  materials  between ecosystems?
TLS Online TPP Program

#Question id: 2760

#Unit 2. Cellular Organization

All the following statements about complex transcription units are true except:
TLS Online TPP Program

#Question id: 8958

#Unit 9. Diversity of Life Forms

A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage). If we were to separate these eight cells and attempt to culture them individually, then what is most
likely to happen?
TLS Online TPP Program

#Question id: 859

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one statement is incorrect about ATG genes;
TLS Online TPP Program

#Question id: 1382

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to cell-cell and cell–extracellular matrix junctions and their adhesion molecules.

A. Adherens junctions and desmosomes are integrin-containing anchoring junctions that bind the membranes of adjacent cells, giving strength and rigidity to the entire tissue.

B. Hemidesmosomes are cadherin-containing anchoring junctions that attach cells to elements of the underlying extracellular matrix.

C. Integrins are a large family of αβ heterodimeric cell-surface proteins that mediate both cell-cell and cell-matrix adhesions and inside-out and outside-in signaling in numerous tissues.

D. Tight junctions block the diffusion of proteins and some lipids in the plane of the plasma membrane, contributing to the polarity of epithelial cells. They also limit and regulate the extracellular (paracellular) flow of water and solutes from one side of the epithelium to the other.

Which of the following statements are incorrect?