Match the following toxins (Column I) with their effects (Column II) on actin.

Column I	Column II
A. Cytochalasin D	i. Enhances nucleation by binding and stabilizing actin dimers and thereby lowering the critical concentration.
B. Latrunculin	ii. Binds at the interface between subunits in F-actin, locking adjacent subunits together and preventing actin filaments from depolymerizing.
C. Jasplakinolide	iii. Depolymerizes actin filaments by binding to the (+) end of F-actin, where it blocks further addition of subunits.
D. Phalloidin	iv. Binds and sequesters G-actin, inhibiting it from adding to a filament end.

#Question id: 5714

#Unit 8. Inheritance Biology

Homologous chromosomes pair in prophase I as a following way, if crossing over occur between P and Q gene of homologous chromosome?

Which of the following consequence of above abnormality?

A. Dicentric chromosome visible at anaphase I

B. Results in formation of acentric chromatid

C. Recombinant gamete unable to produced viable progeny due to missing of many gene

D. Resulting recombinant gamete become aneuploid 

#Question id: 5715

#Unit 8. Inheritance Biology

Following some abnormality is due to Gene rearrangement on chromosome. 

A, Affecting the expression of gene

B. Disrupt the function of gene

C. Reduced recombination between gene present in inverted region

D. Cross over suppressor 

Which of the following above abnormality is may be associated with inversion?

#Question id: 5716

#Unit 8. Inheritance Biology

Which of the meiotic pairing possibilities in tetraploids and their consequence is correct?

A-chromosomes pair as bivalents, segregate normally producing diploid gametes.

B- Chromosomes pair as quadrivalent, segregates normally producing tetraploid gametes.

C-Chromosome pair as Trivalents form, segregation leads to nonfunctional aneuploid gametes

 D- Chromosome pair as Trivalents form, segregation leads to producing diploid gametes

#Question id: 5717

#Unit 8. Inheritance Biology

Following homologous chromosome is a heterozygous for inversion

Following some statement regarding above abnormality is correct?

A. During meiosis, one chromosome twists once at the ends of the inversion to pair with the other untwisted chromosome

B. Crossing-over within the inversion loop at meiosis connects homologous centromeres in a dicentric bridge.

C. Tension eventually breaks the dicentric bridge, forming two chromosomes with terminal deletions.

D. the RF is zero among genes within the inversion region

#Question id: 5718

#Unit 8. Inheritance Biology

aneuploids may arise through nondisjunction, the failure of homologous chromosomes or sister chromatids to separate in meiosis. which of following the incorrect about nondisjuction ?

#Question id: 5719

#Unit 8. Inheritance Biology

Homologous chromosomes pair in prophase I as a following way, if crossingover occur between P and Q gene of homologous chromosome?

Which of the following proceeding event due to this abnormality?

A. Dicentric chromosome become breaks at anaphase I

B. Resulting one of the gamete received chromosome with deleted segment 

C. Recombinant gamete unable to produced viable progeny

D. Unable to separation of chromosome in anaphase II