Practice Questions

TLS Online TPP Program

#Question id: 11828

Given some enzymes of ethylene biosynthetic pathway and its character;

A) ACC synthase                                                               i) It is an unstable, cytosolic enzyme. Its level is regulated by environmental and internal factors, such as wounding, drought stress, flooding, and auxin

B) ACC oxidase                                                                  ii) It catalyzes the last step in ethylene biosynthesis, the conversion of ACC to ethylene

                                                                                                iii) Its activity can be the rate-limiting step in ethylene biosynthesis

                                                                                                iv) That is encoded by a multigene family that is differentially regulated

                                                                                                v) It is present in such low amounts in plant tissues and is very unstable and also difficult to purify the enzyme for biochemical analysis

                                                                                                vi) These enzymes belong to the Fe2+/ascorbate oxidase superfamily

Find out the correct combination from the given enzymes and its character?

#Unit 6. System Physiology – Plant

A-i, ii, vi ; B-iii, iv, v
A-ii, iii, vi ; B-i, iv, v
A-iv, v, vi ; B-i, ii, iii
A-i, iii, iv, v ; B-ii, , vi

More Questions

TLS Online TPP Program

#Question id: 21964

#Unit 2. Cellular Organization

Choose the incorrect statement

a. S/MARs are a DNA sequence which is generally located between H1 and H3 binding sites.

b. S/MARs are a DNA sequence which is generally located between H3 and H4 binding sites

c. S/MARs is a DNA sequence which binds to base structure called matrix

d. S/MARs is a DNA sequence which binds to base structure called scaffold

TLS Online TPP Program

#Question id: 21965

#Unit 2. Cellular Organization

Which of the following is a protein that appears to regulate the association of MARs with the matrix in order to regulate transcription of genes in the vicinity of the MAR

TLS Online TPP Program

#Question id: 21966

#Unit 2. Cellular Organization

Which of the following is true about interphase chromosome

a. Interphase chromosomes occupy chromosome territories in the nucleus

b. Interphase chromosomes occupy chromosome territories toward cell membrane

c. Interphase chromosomes are not entangled with each other except cancer

d. Interphase chromosomes are entangled with each other except cancer

TLS Online TPP Program

#Question id: 21967

#Unit 2. Cellular Organization

Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to

TLS Online TPP Program

#Question id: 21968

#Unit 2. Cellular Organization

Which of the following is correct regarding the euchromatin

a. Active genes/euchromatin are often found at the borders of chromosome territories

b. active genes from several chromosomes may cluster in inter-chromosomal territories that are enriched in transcription machinery

c. Active genes/euchromatin are often found at the periphery of nuclear wall

d. active genes from several chromosomes may cluster in inter-chromosomal territories do not have transcription machinery

TLS Online TPP Program

#Question id: 21969

#Unit 2. Cellular Organization

Choose the correct statement

a. Interphase chromosomes occupy chromosome territories in the nucleus and are not entangled with each other

b. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear periphery

c. Interphase chromosomes occupy chromosome territories in the nucleus and are entangled with each other

d. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear centre