$\text {Elemental analysis of wild-type (WT)}$ $\text { and irt1-1 roots. Plants were grown in}$

question 3

Multiple Choice

$\text {Elemental analysis of wild-type (WT) }$
$\text { and irt1-1 roots. Plants were grown in}$
$\text { the presence \(( + \mathrm { Fe } ) \) or absence \(( - \mathrm { Fe } ) \) }$
$\text { of iron for 5 days. DW \(=\) dry weight}$
$( - \mathrm { Fe } )$ } \text { of iron for 5 days. DW = dry weight} Figure 36.2 -The IRT1 gene is responsible for most of the iron uptake activity in roots Vert et al., Plant Cell 14 [2002]:1223- 33) . To determine the specificity of the IRT1 transporter in Arabidopsis plants, researchers measured the concentration of manganese, zinc, copper, and cobalt contained in wild- type and irt1- 1 mutant plants. What conclusions about IRT1 specificity can you draw from the above data? A) IRT1 participates in the transport of iron, zinc, manganese, and cobalt independent of iron concentration. B) Under iron- deficient conditions, IRT1 is important for the transport of iron and copper. C) IRT1 is important for the transport of iron and copper independent of iron concentration. D) Under iron- deficient conditions, IRT1 is highly specific for Fe. E) Under iron- deficient conditions, IRT1 is necessary for the transport of iron, zinc, manganese, and cobalt. " class="answers-bank-image d-inline" rel="preload" >
Figure 36.2
-The IRT1 gene is responsible for most of the iron uptake activity in roots Vert et al., Plant Cell 14
[2002]:1223- 33) . To determine the specificity of the IRT1 transporter in Arabidopsis plants, researchers measured the concentration of manganese, zinc, copper, and cobalt contained in wild- type and irt1- 1 mutant plants.
What conclusions about IRT1 specificity can you draw from the above data?

• A) IRT1 participates in the transport of iron, zinc, manganese, and cobalt independent of iron concentration.
• B) Under iron- deficient conditions, IRT1 is important for the transport of iron and copper.
• C) IRT1 is important for the transport of iron and copper independent of iron concentration.
• D) Under iron- deficient conditions, IRT1 is highly specific for Fe.
• E) Under iron- deficient conditions, IRT1 is necessary for the transport of iron, zinc, manganese, and cobalt.

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Definitions:

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A sleep disorder causing feelings of terror or dread, commonly involving screaming, flailing, and intense fear during sleep, more often in children.

Somnambulism

A sleep disorder known as sleepwalking, where the person walks or performs other complex behaviors while still asleep.

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Preoperational Stage

The second stage in Piaget’s scheme, characterized by inflexible and irreversible mental manipulation of symbols.