BICD 120 Final Review Session

miR172 promotes the transition of the plant from the juvenile to the adult vegetative and reproductive phases

• True

• False

Which transcription factor is involved in maintaining proliferation of the inflorescence meristem (and thus inhibiting the formation of floral meristems)?

• TERMINAL FLOWER 1 (TF1)

• LEAFY (LFY)

• APETELA1 (AP1)

• AGAMOUS (AG)

Expression of which homeotic genes (along with SEPELLATA) causes formation of petals?

• Class A only

• Class A and Class B

• Class B and Class C

• Class C only

What phenotype would you expect for a flower with class C gene (AGAMOUS) mutated (loss-of-function)?

• 1: sepal

  2: petal

  3: stamen

  4: carpel

• 1: sepal

  2: petal

  3: petal

  4: sepal

• 1: carpel

  2: stamen

  3: stamen

  4: carpel

• 1: carpel

  2: carpel

  3: carpel

  4: carpel

Which of these statements about photoperiods is FALSE?

• When Pr absorbs red light, it changes into Pfr

• Plants measure the length of the night by measuring the Pfr/Pr ratio @ sunrise

• Longer nights result in a higher Pfr/Pr ratio @ sunrise

• Long-day plants need a high Pfr/Pr ratio @ sunrise to flower

Which of these statements about flowering is FALSE?

• Florigen (FLOWERING LOCUS T / FT) is produced in the leaves and acts in the SAM

• When FT forms a complex with FD, this complex activates the floral integrator SOC1

• SOC1 inhibits formation of flowers by inhibiting LFY

• FLOWERING LOCUS C (FLC) inhibits flowering by inhibiting SOC1 and FT

How does vernalization promotes flowering?

• It causes production of FT

• It inhibits expression of FLC

• It inhibits SOC1 expression

• It increases GA production

Which of these genes is mismatched with where they are expressed?

• FUL: valve

• IND: valve margin

• RPL: valve margin

• SHP: valve margin

What phenotypes would you expect in a canola fruit with a loss-of-function of the ful mutant?

• Expression of valve margin genes in the valve; smaller fruit than normal

• Expression of valve margin genes in the valve; larger fruit than normal

• Expression of valve genes in the valve margin; smaller fruit than normal

• Expression of valve genes in the valve margin; larger fruit than normal

Climacteric fruit exhibit a respiratory burst at the start of ripening, whereas nonclimacteric fruit don't have a respiratory burst.

• True

• False