A. cell wall
B. cytoplasm
C. cell membrane
D. none of these
Why skeletal muscles are called striated muscles?
A. They appear darker than smooth muscles by naked eye.
B. Alternating dark and light bands appear on their surface when visualized by naked eye.
C. Alternating dark and light bands appear on their surface when visualized via a microscope.
D. All of these
Whone is not the function of endoplasmic reticulum?
A. Nerve impulse conduction
B. Transport of material
C. Mechanical support
D. Synthesis of conjugated molecules
The three organelles that contain DNA are the nucleus, mitochondria and chloroplasts. Organelles are membrane-bound subunits within a cell — analogous to organs in the body — that perform specific functions. The nucleus is the control center of the cell, and houses genetic information. The mitochondria and chloroplasts both produce energy, in animal and plant cells, respectively.
A. Tissue culture
B. Mutation
C. Antibiosis
D. Recombination
The only group of algae having no flagellated motile cells at any stage is___________?
A. Chrysophyta
B. Phaeophyta
C. Pyrrophyta
D. Rhodophyta