Given below are four metabolic intermediates (i-iv) listed against amino acids (A-E):
A. i - serine, glycine, cysteine
B. iv - alanine, valine, leucine
C. iii - glutamate, glutamine, proline
D. ii - methionine, threonine, lysine
E. i - histidine
Which one of the following options correctly pairs the metabolic intermediates with their corresponding amino acid end product(s)?
EXPLANATION-
A. i - serine, glycine, cysteine → Wrong match; iii gives serine family.
B. iv - alanine, valine, leucine → Correct
C. iii - glutamate, glutamine, proline → Incorrect; i (α-ketoglutarate) gives glutamate family.
D. ii - methionine, threonine, lysine → Correct
E. i - histidine → Histidine is derived from ribose-5-phosphate, not α-ketoglutarate.
The correct answer is (b)
Given below are the different stages of Arabidopsis embryogenesis (Column X) and their characteristic patterns of cell division (Column Y).
Column X
A. Zygotic
B. Globular
C. Heart
D. Torpedo
Column Y
i. Formation of an 8-cell embryo, exhibiting radial symmetry and undergoing additional cell division to create the protoderm
ii. Polarized growth of cells followed by a symmetric transverse division giving rise to a small apical cell and an elongated basal cell
iii. Cell elongation and cellular differentiation processes throughout the embryonic axis with visible distinction between the adaxial and abaxial tissue of the cotyledons
iv. Focused cell division forming two cotyledons, giving bilateral symmetry to the embryo
Which one of the following options represents the correct match between Column X and Column Y?
The taxon cycle is the predicted, progressive ecological and evolutionary changes in the descendants of founding populations. Taking the case of insular biotas, the figure can be used to conceptualize and predict species types (a, b, c, d, e, f, g, h) based on their fundamental capacities to evolve, immigrate, and persist.
The table below has species types (Column X) and the possible traits (Column Y) associated with each type.
Which one of the following options represents all correct matches between Column X and Column Y?
In amphibians and fish, the cells of the organizer ultimately contribute to i) pharyngeal endoderm, ii) head mesoderm, iii) dorsal mesoderm, and iv) dorsal blastopore lip. The following statements are made about the function of the organizer and its derivatives:
A. The pharyngeal endoderm and pre-chordal plate prevent formation of forebrain and midbrain.
B. The organizer has the ability to dorsalize the ectoderm and induce formation of the neural tube.
C. The dorsal mesoderm inhibits induction of the hindbrain and trunk.
D. The organizer tissue possesses the ability to dorsalize the surrounding mesoderm into somite-forming mesoderm.
Which one of the following options is a combination of all correct statements?
ENZ function prevents premature differentiation of mouse neural stem cells. Kinase inhibitor treatment differentiates these cells prematurely. This is prevented if a specific serine-to-aspartate (S to D) mutation is introduced in ENZ. Based on this information, which one of the following statements is INCORRECT?
Which one of the following statements about evolution of the vertebrate brain is most accurate?
Given below are the different stages of Arabidopsis embryogenesis (Column X) and their characteristic patterns of cell division (Column Y).
Column X
A. Zygotic
B. Globular
C. Heart
D. Torpedo
Column Y
i. Formation of an 8-cell embryo, exhibiting radial symmetry and undergoing additional cell division to create the protoderm
ii. Polarized growth of cells followed by a symmetric transverse division giving rise to a small apical cell and an elongated basal cell
iii. Cell elongation and cellular differentiation processes throughout the embryonic axis with visible distinction between the adaxial and abaxial tissue of the cotyledons
iv. Focused cell division forming two cotyledons, giving bilateral symmetry to the embryo
Which one of the following options represents the correct match between Column X and Column Y?
The taxon cycle is the predicted, progressive ecological and evolutionary changes in the descendants of founding populations. Taking the case of insular biotas, the figure can be used to conceptualize and predict species types (a, b, c, d, e, f, g, h) based on their fundamental capacities to evolve, immigrate, and persist.
The table below has species types (Column X) and the possible traits (Column Y) associated with each type.
Which one of the following options represents all correct matches between Column X and Column Y?
In amphibians and fish, the cells of the organizer ultimately contribute to i) pharyngeal endoderm, ii) head mesoderm, iii) dorsal mesoderm, and iv) dorsal blastopore lip. The following statements are made about the function of the organizer and its derivatives:
A. The pharyngeal endoderm and pre-chordal plate prevent formation of forebrain and midbrain.
B. The organizer has the ability to dorsalize the ectoderm and induce formation of the neural tube.
C. The dorsal mesoderm inhibits induction of the hindbrain and trunk.
D. The organizer tissue possesses the ability to dorsalize the surrounding mesoderm into somite-forming mesoderm.
Which one of the following options is a combination of all correct statements?
ENZ function prevents premature differentiation of mouse neural stem cells. Kinase inhibitor treatment differentiates these cells prematurely. This is prevented if a specific serine-to-aspartate (S to D) mutation is introduced in ENZ. Based on this information, which one of the following statements is INCORRECT?
Which one of the following statements about evolution of the vertebrate brain is most accurate?
