Practice Questions

TLS Online TPP Program

#Question id: 9238

Which of the following is a consequence of biological magnification?

#Unit 9. Diversity of Life Forms

Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.
Populations of top-level predators are generally smaller than populations of primary consumers.
Only a small portion of the energy captured by producers is transferred to consumers.
The amount of biomass in the producer level of an ecosystem decreases if the producer turnover time increases

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TLS Online TPP Program

#Question id: 10275

#Unit 6. System Physiology – Plant

In the initial phase of glycolysis, each hexose unit is phosphorylated twice and then split, producing two molecules of triose phosphate, in these reactions included irreversible reaction. How much irreversible reaction is performed in the glycolytic pathway through in this series of reactions?

TLS Online TPP Program

#Question id: 1564

#Unit 4. Cell Communication and Cell Signaling

When antibodies bind antigens, the clumping of antigens results from ________.

TLS Online TPP Program

#Question id: 4100

#Unit 3. Fundamental Processes

some pre-mRNAs are spliced by an alternative, low-abundance form of the spliceosome. This rare form contains some components common to the major spliceosome, but it contains other unique components such as

TLS Online TPP Program

#Question id: 14904

#Unit 6. System Physiology – Plant

Cell walls commonly are classified into two major types. This classification is based not on structural or biochemical differences;

A) primary walls and

B) secondary walls

i) walls formed during cell growth

ii) walls that are formed after cell enlargement stops

iii) multilayered walls that are strengthened and waterproofed by lignin

iv) Usually they are thin and simple, but sometimes may be thick and multilayered, such as those found in collenchyma or in the epidermis

v) highly specialized in structure and composition, reflecting the differentiated state of the cell

Which of the following correctly represents features of primary and secondary walls?