Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6087
TLS Online TPP Program

#Question id: 7287

Following statements are regarding to the the floral quartet model and the underlying ABCDE model of organ identity determination in Arabidopsis thaliana.

A. Five floral organ identities (sepals, petals, stamens, carpels, and ovules) are specified by the formation of floral organ-specific tetrameric complexes of MADS-domain transcription factors that bind to two nearby enhancer elements, forming a DNA loop in between.

B. A complex of two class A proteins (APETALA 1) and two class E proteins  (SEPALLATA) determines petal identity.

C. A complex of one class A protein, one class E protein, and one of each of the class B proteins (APETALA 3 and PISTILLATA) determines sepal identity.

D. A complex of one class E protein, two class B proteins, and one class C protein (AGAMOUS) determines stamen identity, while a complex of two class E proteins and two class C proteins determines carpel identity.D. A complex of one class E protein, two class B proteins, and one class C protein (AGAMOUS) determines stamen identity, while a complex of two class E proteins and two class C proteins determines carpel identity.

E. A complex of one class E protein, one class C protein, and one of each of the class D proteins (SHATTERPROOF and SEEDSTICK) controls ovule identity.

Which of the following combination are correct?

#Unit 5. Developmental Biology
  1. A and B
  2. A, B, and C
  3. A, B, C and D
  4. A, D and E
More Questions
TLS Online TPP Program

#Question id: 5637

#Unit 5. Developmental Biology

In an experiment, Sperm from mice carrying loss-of-function mutations in the Izumo gene. Which of the following statement is correct?
TLS Online TPP Program

#Question id: 2793

#Unit 2. Cellular Organization

Chromosome painting involves
TLS Online TPP Program

#Question id: 15760

#Unit 5. Developmental Biology

Why Stem cells are sometimes referred to as “undifferentiated”?
TLS Online TPP Program

#Question id: 5355

#Unit 8. Inheritance Biology

The characteristics of X-linked inheritance as following statement are correct

A- Reciprocal crosses resulting in different phenotypic ratios in their offspring 

B- Heterozygous females transmit each X-linked allele to approximately half their daughters and half their sons

C- Males that inherit an X-linked recessive allele always exhibit the recessive trait

D-Females that inherit an X-linked recessive allele from male always exhibit the dominant trait

E- Males do not transmit each X-linked allele to their sons
TLS Online TPP Program

#Question id: 5231

#Unit 11. Evolution and Behavior

Although quite different in structure, plants and animals share some basic similarities in their development, such as