Practice Questions

TLS Online TPP Program

#Question id: 12187

How cells know whether sister kinetochores are properly attached to the mitotic spindle?

#Unit 2. Cellular Organization

When sister chromatids are correctly attached to microtubules, their kinetochores are under tension. Mitotic spindle attached to the kinetochores pull at them, and the cohesin molecules that hold the sister chromatids together withstand these forces, creating tension at kinetochores.
When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. One kinetochore attaches to microtubules emanating from two opposite spindle poles.
When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. Both sister kinetochores attach to microtubules emanating from the same spindle pole.
When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. Only one of the two sister kinetochores attaches to microtubules.

More Questions

TLS Online TPP Program

#Question id: 12529

#Unit 6. System Physiology – Plant

During the mid- to late stages of seed development, specific mRNAs accumulate in embryos, These mRNAs encode so-called late-embryogenesis-abundant (LEA) proteins thought to be involved in desiccation tolerance. This mRNA accumulation in embryo at the time of high levels of which endogenous hormone?

TLS Online TPP Program

#Question id: 12530

#Unit 6. System Physiology – Plant

Some given hormones is also called a ubiquitous hormone?

c) Abscisic acid

d) Brassinosteroids

TLS Online TPP Program

#Question id: 12531

#Unit 6. System Physiology – Plant

The most bioactive brassin in eudicots, which is a polyhydroxylated steroid similar to animal steroid hormones that brassin is

TLS Online TPP Program

#Question id: 12532

#Unit 6. System Physiology – Plant

In Arabidopsis some brassinosteroid mutants given below;

a) 3-week-old light-grown homozygous bri1 mutant shown a severe dwarf plant while heterozygous bri1 mutant exhibits wild-type morphology

b) 3-week-old light-grown homozygous cpd (constitutive photomorphogenisis and dwarfism) mutant exhibits a wild-type phenotype while heterozygous mutant shown a dwarf phenotype

c) The dark-grown det2 mutant has short, thick hypocotyls and expanded cotyledons while the dark-grown wild type has long, thin hypocotyl

d) The dark-grown det2 mutant has exhibits a wild-type phenotype

Which of the following given mutants of brassinosteroid is correct?

TLS Online TPP Program

#Question id: 12533

#Unit 10. Ecological Principles

If the flow of energy in an arctic ecosystem goes through a simple food chain, perhaps involving humans, starts from seaweeds to fish to seals to polar bears, then which of the following could be true?

TLS Online TPP Program

#Question id: 12534

#Unit 10. Ecological Principles

Which of the following statements is correct about biogeochemical cycling?