PLEASE SOLVE THESE QUESTIONS...
Q.1 Where does the genetic material occur in eukaryotic cells?
Q.2 Name the source of illumination in an electron microscope.
Q.3 Give the concentration of salt solution which is isotonic for R.B.Cs.
Q.4 Name the term used for the genetic material which lies in direct contact with the cytoplasm in
prokaryotes
Q.5 Which lens unit produces a primary magnified image in a compound microscope?
Q.6 Which cell organelle is commonly called 'cellular housekeeper’'? From where does it arise?
Q.7 Which type of endoplasmic reticulum is more abundant (i) near the nucleus (ii) near the plasma
membrane?
Q.8 Name the cell organelle which gives rise to the acrosome in an animal sperm.
Q.9 What will happen when R.B.Cs are kept in 10% glucose solution?
Q.10 What happens when fresh grapes are kept in a concentrated sugar solution?
Q.11 What will happen when plant leaves are boiled and then a drop of concentrated sugar solution is
added on boiled plant leaves?
Q.12 Name three basic components of a typical eukaryotic cell.
Answers
Answer:
Q.1)Ans:- The nucleus is bound with the double membrane in a eukaryotic cell in which most of the genetic material is present. The genetic material contains DNA and RNA.
Q.2)Ans:-In transmission electron microscope (TEM), the source of illumination is a beam of electrons of very short wavelength, emitted from a tungsten filament at the top of a cylindrical column of about 2 m high. The whole optical system of the microscope is enclosed in vacuum.
Q.3)Ans:-Cs." 0.9% of salt solution
Q.4)Ans:-By definition, prokaryotes lack a membrane-bound nucleus to hold their chromosomes. Instead, the chromosome of a prokaryote is found in a part of the cytoplasm called a nucleoid.
Q.5)Ans:-Which lens unit produces a primary magnified image in compound microscope ? Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. Objective lens unit.
Q.6)Ans:-lysosym is the cell housekeeper organelle. They are membrane-bound vesicles that contain digestive (hydrolytic) enzymes. They digest worn out and diseased organelles therefore keeping the cell "clean" hence known as housekeeper of cells or scavengers of cell.
Q.7)Ans:-ROUGH ENDOPLASMIC RETICULUM
ROUGH ENDOPLASMIC RETICULUMRough ER is found throughout the cell but the density is higher near the nucleus and the Golgi apparatus. Ribosomes on the rough endoplasmic reticulum are called 'membrane bound' and are responsible for the assembly of many proteins. This process is called translation.
Q.8)Ans:-Answer Expert Verified
Answer Expert VerifiedAlso known as Golgi apparatus or Golgi complex helps in the formation of Acrosome in the head part of Animal sperm.
Q.9)Ans:-Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. R.B. Cs will shrink due to exosmosis.
Q.10)Ans:-The grapes shrink in other words they become flaccid. This is because the concentrated sugar solution is hypertonic to the grape cells hence draws water from the cells by osmosis causing the cytoplasm of the grape cells to shrink.
Q.11)Ans:-What happens when rheo leaves are boiled in water first and then a drop of sugar syrup is put on it? Answer: When rheo leaves are boiled, this will shrink due to high temperature. The solute content within the leaves will falls out during heating due to osmosis.
Q.12)Ans:-Plasma membrane, nucleus and cytoplasm.
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