Practice Questions

TLS Online TPP Program

#Question id: 5683

There may be an important connection between sperm translocation and capacitation. Which of the following option is correct explanation of above statement?

#Unit 5. Developmental Biology

The influx of bicarbonate ions (and possibly other ions) alkalinizes the sperm, raising its pH.
before entering the ampulla of the oviduct, the uncapacitated sperm bind actively to the membranes of the oviduct cells in the narrow passage (the isthmus) preceding it. This binding is temporary and appears to be broken when the sperm become capacitated.
The cholesterol efflux from the sperm cell membrane is thought to change the location of its “lipid rafts,” isolated regions that often contain receptor proteins that can bind the zona pellucida and participate in the acrosome reaction.
Capacitation is a transient event but translocation is not.

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TLS Online TPP Program

#Question id: 22955

#Unit 5. Developmental Biology

Based On ABC model during flower development, loss of class A activity results the formation of only stamen and carpel. Which of the flowering floral organs identity genes controls the class A activity ?

TLS Online TPP Program

#Question id: 22956

#Unit 5. Developmental Biology

Individual and overlapping expression of homeotic genes in adjacent whorl of a flower determine the pattern of floral organ development. In an Arabidopsis mutant, floral organs are distributed as follows

Loss of function mutation in which one of the following genes would have caused the above pattern of floral organs development

TLS Online TPP Program

#Question id: 22957

#Unit 5. Developmental Biology

floral organ development is controlled by overlapping expressions of A class , B class and C class genes in different whorls. In an Arabidopsis mutant, the floral whorls had following pattern:

Sepal àSepal àcarpel àcarpel

Mutation in which one of the following class of gene causes above pattern.

TLS Online TPP Program

#Question id: 22958

#Unit 5. Developmental Biology

Which of the following statement is correct regarding to the flower development in Arabidopsis?

TLS Online TPP Program

#Question id: 7288

#Unit 5. Developmental Biology

Following statements are regarding to the expression of genes in floral quartate model in Arabidopsis thaliana.

A. Sepals- AP1(heterodimer) + SEP(homodimer)

B. Petals-AP1(monomer)+PI(monomer)+AP3(monomer)+SEP(monomer)

C. Stamens- AP3(monomer)+PI(monomer)+AG(monomer)+SEP(monomer)

D. Carpels- AG(homodimer)+SEP(homodimer)

Which of the following genetic combinations are incorrect?

TLS Online TPP Program

#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)