EXTRA
QUESTIONS
LIFE
UNDER MICROSCOPE
(
L- 4)
Q.1. Name the
following:
1. A
bacterium that helps in curdling of milk.
2. A fungus used in preparation of antibiotics.
3. A microbe used in bread industry.
4. A microorganism used in production of alcohol.
5. Two diseases each caused by bacteria, fungi,
protozoa and viruses.
6. The scientist who discovered penicillin.
7. Two food items prepared by using yeast.
8. Malaria causing organism.
9. An autotrophic protozoan.
10. An edible fungi.
Q. 2. Fill in
the blanks:
1. …………..
are on the borderline of living and nonliving.
2. Vaccines employ use of weakened ……………………
3. ……………. is present in human intestine.
4. Vibrio is a ……………. shaped bacteria.
5. …………..is a unicellular fungus.
6. Roots like
structure of fungi are called as ……………
7. ……….is a filamentous alga.
8…………is a hormone which has been produced by GM
bacteria and is used to control blood and sugar level.
9. …………., ………..diseases can be prevented by
vaccination.
10. Proteins extracted from single celled algae, yeasts,
fungi and bacteria are called as ……………….
Q.3.
Give reasons:
1. Food poisoning incidences are more in rainy
season.
2. Doctors advise not to eat stale food.
3. Food preservation is essential.
4. Algal blooms result in death of aquatic organisms.
5. Vaccines are given at the time of birth.
CELLS
– THE BUILDING BLOCKS OF LIFE
LESSON
-2
Q.1.
Name the following:
1. Functional unit of DNA.
2. Instrument used to observe tiny objects.
3. Scientist who discovered cell.
4. Control centre of cell.
5. Undefined nuclear region of prokaryotic cell.
6. An enucleate cell.
7. Outermost covering of animal cell.
8. Jelly like substance between cell membrane and
nucleus.
9. Suicidal bags of cell.
10. Founders of cell theory.
Q.2.
Fill in the blanks:
1. Chloroplast is absent from ……………..cells.
2. ………….has ribosomes attached to it.
3. Cell wall is present in …………….cells.
4. Plasma membrane is formed of …………… and …………….
5. ………….and ………….are single celled organisms.
6. …………stiffens the plant to stand erect.
7……………is called living content of cell.
8. Plant cell wall is made up of ………
9. DNA stands for ………………………………………………..
10. ………….are the sites of protein synthesis.
11. ……….are the plastids which store products starch.
Q.3.
Give reasons:
1. What will happen to a cell if its nucleus is
removed?
2. Plasma membrane is called as selectively
permeable membrane.
3. Plastids are called as “Kitchen of plant cells” .
4. Mitochondria are called as power house of the
cell.
5. Lysosomes are called as suicidal bags of the
cell.
TISSUES
: CELLS IN UNISON
(
Lesson – 3)
Q.1.
Name the following:
1. Meristem
located at root and shoot apex.
2. Supporting cells for neurons.
3. Two proteins of muscle cells.
4. An avascular tissue.
5. Animals which lack presence of tissues and organ
systems
6. Cells which do not undergo replacement or repair
in human body after birth.
7. A protective tissue in plants which is dead.
8. Tissue which forms endoskeleton of the body.
9. A living
conductive tissue in plants.
10.Meristems found at the base of internodes.
Q.2.
Fill in the blanks:
1. ………..is the unit of nervous tissue.
2. ………..carry messages towards cell.
3. Connective tissue with fluid matrix is …………….
4. Tissue that forms inner lining of mouth is ………………
5. ……connects muscles to bones.
6. ……………muscle control movement of urinary bladder,
uterus.
7…………..is the gelatinous layer on which rests
epithelial cells.
8. ……………..is an aggregation of cells that are
similar in structure , functions or both.
9…………..are the tissues that stores fats.
10. Tissues that secrete number of important
substances like hormones and enzymes………………….
Q.3.
Give reasons:
1. Skeletal muscle is called as striated muscle .
2. Cardiac muscles are called as involuntary
muscles.
3. Sclerenchyma cells are dead.
4. Muscles have the property to contract.
5. What is the need for cells and tissues specialisation. ?
