Following statements regarding to the molecular processes of capacitation.

A. The sperm cell membrane is altered by the removal of cholesterol by albumin proteins in the female reproductive tract.

B. Particular proteins or carbohydrates on the sperm surface are lost during capacitation.

C. The membrane potential of the sperm cell becomes more positive as potassium ions leave the sperm. This change in membrane potential may allow calcium channels to be opened and permit calcium to enter the sperm.

D. Calcium and bicarbonate ions are critical in activating cAMP production and in facilitating the membrane fusion events of the acrosome reaction.

E. As a result of cAMP formation, protein phosphorylation occurs. Once they are phosphorylated, some proteins migrate to the surface of the sperm head. One of these proteins is juno, which is critical in sperm-egg fusion.

which one of the following combinations is correct?

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#Question id: 7294

#Unit 5. Developmental Biology

Multiple factors regulate flowering in Arabidopsis. FT mRNA is expressed in companion cells of the leaf vein in response to multiple signals, including day length, light quality, and temperature. FT moves in the phloem from leaves to the apical meristem. FT is unloaded from the phloem in the meristem and interacts with FD.

FT-FD complex activates multiple genes. Which of the following combination is correct?(SS)

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#Question id: 7296

#Unit 5. Developmental Biology

some of the following statements regarding to this experiment are given below. Which of the following statements is incorrect?

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#Question id: 7300

#Unit 5. Developmental Biology

Following genes regulate flowering, column I represents genes, column II represents transcription factor family and column III represents functions.

Column I	Column II	Column III
A. FLOWERING D (FD)	i. bZIP	a. Activates flowering downstream of florigen
B. SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1)	ii. MADS	b. Receptor for florigen
C. FLOWERING LOCUS C		c. Class E homeotic genes
D. SEPALLATA (SEP)		d. Floral repressor

 Which of the following is correct?

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#Question id: 22944

#Unit 5. Developmental Biology

In the floral meristem, the FT-FD complex activates the expression of

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#Question id: 22938

#Unit 5. Developmental Biology

Genes that regulate flowering, have different transcription factors and functions:

 

Choose correct match:

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#Question id: 7314

#Unit 5. Developmental Biology

With reference to plant flowering pattern; match the terms of Column I with the most appropriate term of Column II. (Se-Sepal; Ca-Carpel; St-stamen; Pe-Petal)

s.no.	Homeotic mutants (Column 1)	S. No	Flower patterning (Column 2)
A.	Apetala2 mutant	I.	Ca-Ca-Ca-Ca
B.	Agamous /Apetala3 mutant	II.	Se-Pe-Pe-Se
C.	Agamous mutant	III.	Se-Se-Se-Se
D.	Apetala2/Apetala3 mutant	IV.	Ca-St-St-Ca