Plant Cell Bio Exam 2

The correct sequence of events in the light reactions is

absorption of sunlight, splitting of water, electrons flow down the electron transport chain, ATP is made.

Beta oxidation of fatty acids in plants occurs in the:

Peroxisomes

Fermentation is done so that: 

The organism can recycle NAD to keep glycolysis running.

The enzyme that performs the primary fixation of CO2 in CAM and C4 plants is phosphoenolpyruvate carboxylase (PepC).

True

Glycolysis and respiration are very similar in animal and plant cells.

True

The major form in which sugars are transported in plants is:

Sucrose

The major force driving the transport of organic compounds in the phloem is:

Concentration gradients of solutes in combination with active transporters.

True or False: Stomata closure is achieved by increasing the turgor pressure in the guard cells.

False

The oxygen produced during photosynthesis is coming from 

The photolysis of water

The three cycles of the Calvin cycle are 

Carbon fixation, reduction, regeneration

Sink tissue is best described as 

A tissue that still needs metabolite support from other parts of the plant

Which light quality causes the opening of stomata?

blue

Sieve elements and companion cells differ in that.....

Companion cells have a nucleus, while sieve elements have not

Oxygen is the terminal electron acceptor in photosynthesis. 

True

All receptors in plant cells are localized in the plasma membrane.

False

The correct order of events during a signaling cascade is as follows:

Signal, receptor, amplification, transmission, response

Calcium is a signal amplifier.

True

Plants cannot create electrical signals for long-distance transmission. 

False

Which part of the sunlight can be used as a signal?***

Blue light & Red light.

Cryptochrome senses which light as a signal?

Blue 

Phytochrome regulates seed germination in some plants.

True

Which ion is used in plants for action potentials?***

Sodium

Which of the following hormones has a receptor in the nucleus?

gibberellin, auxin, & Jasmonic acid

Cryptochrome regulates chloroplast positioning under varying light conditions.

True

The receptor for ethylene is active in the absence of ethylene.

True

The status of the receptor for ethylene in the absence of ethylene is active?

True

Which plant hormone is also produced by a pathogenic fungi and causes plants to grow? 

Gibberellic acid

Which plant hormone regulates the differential growth response after a blue light stimulus?

Auxin

Which hormone regulates abiotic stress responses that are caused by limited water availability?

Abscisic acid

All receptors for hormones are located in the same cellular structure.

False

What is the major plant hormone that regulates defenses against insect herbivores?

Jasmonic acid

Some plant hormones use very similar signaling pathways that are characterized by the removal of a suppressor of transcription. Which of the following hormones fall under that description?****

Auxin, Jasmonic acid, Brassinosteroid, & Cytokinine

Which of the following hormones is essential for plants?

auxin