CBSE
Multiple Choice QuestionsCentromere is required for
transcription
crossing over
cytoplasmic cleavage
movement of chromosomes towards poles
Cell membrane in animals is composed mainly of the molecule of
lipids
proteins
lipids and proteins
carbohydrates
Cell theory was propounded in 1838-39 by
Schleiden
Schwann
Schleiden and Schwann
Virchow
The basic unit of chitin is
N-acetyl glucosamine
glucose
galactose
fructose
Arachidonic acid is
non-essential fatty acid
essential fatty acid
poly unsaturated fatty acid
both 'b' and 'c'
What type of enzyme are present in lysosome
ATPase
Hydrolytic
Lyase
None of these
Which one is single membrane cell organelle
Endoplasmic reticulam
Mitochondria
Lysosomes
Chloroplast
A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?
Yellow
Green
Blue
Red
Protein synthesis in an animal cell occurs
only on the ribosomes present in cytosol
on ribosomes present in cytoplasm as well as in mitochondria
only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
on ribosomes present in the nucleolus as well as in cytoplasm
The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
mitochondria
endoplasmic reticulum
lysosome
chloroplast
