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TLS Online TPP Program

#Question id: 12784

Which of the following is true of detrivores?

#Unit 10. Ecological Principles
  1. They recycle chemical elements directly back to primary consumers.
  2. They synthesize organic molecules that are used by primary producers.
  3. They convert organic materials from all trophic levels to inorganic compounds usable by primary producers.
  4. They secrete enzymes that convert the organic molecules of detritus into CO2 and H2
More Questions
TLS Online TPP Program

#Question id: 1390

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements describes the events of apoptosis?
TLS Online TPP Program

#Question id: 17220

#Unit 7. System Physiology – Animal

Which of the following occurs when certain adaptive hormones are released and cause changes in the structure and chemical composition of the body?
TLS Online TPP Program

#Question id: 2975

#Unit 2. Cellular Organization

Following statements are regarding to the Surveillance mechanisms in cell cycle regulation.

A. Surveillance mechanisms known as checkpoint pathways establish dependencies among cell cycle events and ensure that the next cell cycle event does not occur prior to the completion of a preceding event.

B. In response to DNA damage, two related protein kinases, ATM and ATR, are recruited to the site of the damage, where they activate signaling pathways that lead to cell cycle arrest, repair, and under some circumstances, apoptosis.

C. The spindle assembly checkpoint pathway, which causes initiation of anaphase, utilizes Mad2 and other proteins to regulate APC/CCdc20, which targets securing and mitotic cyclins for ubiquitinylation.

D. The spindle position checkpoint pathway prevents mitotic CDK inactivation when the spindle is mispositioned. In this pathway, localized activators and inhibitors and a sensor that shuttles between them allow cells to sense spindle position.

Which of the following statement is incorrect?
TLS Online TPP Program

#Question id: 7751

#Unit 5. Developmental Biology

Ultrastructural studies have led to the characterization of two distinctive cytological
pathways of PCD in plants;
I) Vacuolar-type PCD
II) Hypersensitive response-type (HR-type) PCD
a) cytosol and all its organelles, including the plasma membrane, are completely brokendown
b) The vacuole loses water, resulting in marked cell shrinkage, contraction from the cell wall,
and nuclear DNA degradation
c) PCD occurs in leaves in response to microbial attack
d) cell wall is either partially or completely digested as well, as in endosperm tissue
e) Continued water loss from the cytosol leads to the breakdown of the plasma membrane
and the release of residual cellular contents into the apoplast
Given characterization of PCD pathway match with its type PCD?
TLS Online TPP Program

#Question id: 11653

#Unit 10. Ecological Principles

Given some characteristics of the climax community

i) Tolerate its own reactions

ii) Tends to become mesic

iii) Less stable

iv) Complex stratification

v) Simple food web

vi) Less mutualism

vii) Gross production is equals to community respiration

viii) Net community production is zero

Which of the following combination shows the characteristics of climax community?