Cellular organelles with membranes are

• nuclei, ribosomes and mitochondria

• chromosomes, ribosomes and endoplasmic

• endoplasmic reticulum, ribosomes and nuclei

• endoplasmic reticulum, ribosomes and nuclei

The motile bacteria are able to move by 

• fimbriae

• flagella

• cilia

• cilia

Which one of the following does not differ in E.coli and Chlamydomonas?

• Ribosomes

• Chromosomal organisation

• Cell wall

• Cell wall

What is true about ribosomes?

• The prokaryotic ribosomes are 80S, where S stands for sedimentation coefficient. 

• These are composed of ribonucleic acid and proteins

• These are found only in eukaryotic cells

• These are found only in eukaryotic cells

Nuclear membrane is absent 

• Penicillium

• Agaricus

• Volvox

• Volvox

Select the correct statement from the following regarding cell membrane.

• Na⁺ and K⁺ ions move across cell membrane by passive transport

• Proteins make up 60 to 70% of the cell membrane

• Lipids are arranged in a bilayer with polar heads towards the inner part

• Lipids are arranged in a bilayer with polar heads towards the inner part

Which one of the following structures is an organelle within an organelle?

• Ribosome

• Peroxisome

• ER

• ER

Which one of the following cellular parts is correctly described?

• Thylakoids - flattened membranous sacs forming the grana of chloroplasts

• Centrioles - sites for active RNA synthesis

• Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)

• Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)

199.

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

• cristate

• grana

• stroma lamellae

• stroma lamellae

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

• metacentric

• acrocentric

• telocentric

• telocentric