Biology : Cell : The Unit of Life

Which of the following statements regarding cilia is not correct?

• The organized beating of cilia is controlled by fluxes of Ca²⁺ across the membrane

• Cilia are hair-like cellular appendages

• Microtubules of cilia are composed of tubulin

• Microtubules of cilia are composed of tubulin

Cri-du-chat syndrome in humans is caused by the

• fertilization of an XX egg by a normal Y-bearing sperm

• loss of half of the short arm of chromosome 5

• loss of half of the long arm of chromosome 5

• loss of half of the long arm of chromosome 5

Which of the following RNAs should be most abundant in animal cell?

• r-RNA

• t-RNA

• m-RNA

• m-RNA

Which of the following components provides sticky character to the bacterial cell?

• Cell wall

• Nuclear membrane

• Plasma membrane

• Plasma membrane

Statement I Microtubules are formed only in animal cells. 

Statement II Microtubules are made up of a protein called myosin.

Choose the correct option

• Statement I is correct and statement II is incorrect.

• Statement II is correct and statement I is incorrect.

• Both statement are correct

• Both statements are incorrect

The chromosome in which centromere is situated close to one end are

• Metacentric 

• Acrocentric

• Telocentric

• Sub-metacentric

Animal cell differ from plant cell in possessing

• Vacuoles

• Centrosomes

• Pastids

• Mitochondria

Which of the following organelles does not contain RNA?

• Plasmalemma

• Ribosome

• Chromosome

• Nucleolus

Dutrochet has given the concept about cell in

• 1834

• 1814

• 1822

• 1824

Which of the following is an epidermal cell containing chloroplast?

• Stomata

• Hydathode

• Guard cell

• None of these