$($A$)$ Since multice ing statements below regarding signaling in plants is CORRECT?

homologs of most alarity evolved before the divergence of the plant and animal lineages, plants have

$($B$)$ Receptor tyrosine anal signaling proteins, such as Ras, JAK, and STAT.

$($C$)$ G$-$protein$-$couple kinases are the largest class of cell$-$surface receptors in plant cells.

$($D$)$ Leucine$-$rich repled receptors are common cell$-$surface receptors in plant cells.

serine$/$threonine kinat $($LLR$)$ receptor kinases are the most abundant type of receptor

$2.$ What is true regarding ethylene receptors in plant cells?

a$.$ They are located primarily at the plasma membrane.

b$.$ They are single$-$pass transmembrane proteins.

c$.$ They are members of the receptor tyrosine kinases.

d$.$ They are located primarily in the ER membrane.

$3.$ In plants, there is a cytoplasmic serine$/$threonine kinase that is activated by red light and inactivated by far$-$red light. What is its name?

a$.$ Phototropin

b$.$ Photoreceptor

c$.$ Cryptochrome

d$.$ Phytochrome

$4.$ Cytokine receptors differ from the receptor tyrosine kinases in that cytokine receptors themselves do not have enzymatic activity

$($a$)$ True

$($b$)$ False

$5.$ Which of the following statements is INCORRECT for intermediate filaments?

$($a$)$ include keratin and neurofilaments

$($b$)$ support and strengthen the nuclear envelope

$($c$)$ a component of the mitotic spindle

$($d$)$ can be connected through desmosomes

$6.$ Kinesins and dyneins

$($a$)$ are inhibited by colchicine and taxol

$($b$)$ move along both microtubules and actin filaments

$($c$)$ often move in opposite directions to each other

$($d$)$ derive their energy from GTP hydrolysis

$7.$ Which of the following structures shortens during muscle contraction?

$($a$)$ Myosin filaments

$($b$)$ Flagella

$($c$)$ Sarcomeres

$($d$)$ Actin filaments

$($e$)$ both $($a$)$ and $($d$)$