2. A. (i) Nucleotides are the buildings blocks of nucleic acids. What are the 2 different types of nucleotides which make nucleic acids?
(a)
(b)
(ii) What
are the pairs of nitrogen bases which make bonds between two strands of DNA
molecule?
(a)
(b)
(iii)
Name three similarities between RNA and DNA molecules
DNA RNA
(a)
(b)
(c)
(iv) (a)
There are three types of RNA molecules. Name the RNA type which does the
following function.
(a) Site
for assembling of polypeptide chains-
(b)
Copying genetic information
(B) (i) Nucleotides do major functions in a living body other than forming nucleic acids. Name one function of each of the following nucleotides.
(a) ATP-
(b) FAD
(c) NADP+
(ii) Light microscopes and Transmission electron microscopes are very important in studying cytology. Compare the use of two instruments regarding the following facts.
Fact
Light Microscope T Electron microscope
(a).
Staining of the specimen
(b).
Converging of beams to the
Specimen.
(c).
Observing the specimen
(iii) Name the biologist who put forwarded the following fact regarding cell theory.
“All
cells arise from pre-existing cells.”
(iv) Name two features possessed by all living cells
(C) (i) What are the differences in genetic material found in prokaryotes and eukaryotes?
(ii) Name three common features found in bacteria, archaea, and cyanobacteria.
(a)
(b)
(c)
(iii)
Given below are some of the chemicals found as cell wall materials in various
organisms. Name the organism that possesses them in front of the chemical
compound.
(a)
Peptidoglycan-
(b)
Chitin-
(c)
Protein –
(iv) Name 2 differences between the flagella of bacteria and the flagella of Euglena.
Answer
2.A. (i) Nucleotides are the buildings blocks of nucleic acids. What are the 2 different types of nucleotides?
(a)
Ribonucleotide
(b) Deoxy
ribonucleotide
(ii) What
are the pairs of nitrogen bases make bonds between two strands of DNA molecule?
(a) Adinine
and Thyamin
(b) Cytocin
and Guanin
(iii) Name three similarities between RNA and DNA molecules
(a) Both
have sugar-phosphate bonds
(b) Both
have purin, Nitrogen bases
(iv) (a) There are three types of RNA molecules. Name the RNA type which does the following function.
(a) Site
for assembling of polypeptide chains- rRNA
(b)
Copying genetic information- mRNA
(B) (i) Nucleotides do major functions in the living body other than forming nucleic acids. Name one function of each of the following nucleotides.
(a) ATP-
Universal energy carries
(b) FAD-
An electron carrier
(c) NADP+
- As a reducing agent
(ii) Light microscopes and Transmission electron microscopes are very important in studying cytology. Compare the use of two instruments regarding the following facts.
Fact
Light Microscope Electron microscope
(a).
Staining of the specimen Dyes are used heavy metals are used
(b).
Converging of beams to the
Specimen.
Glass lenses are used Magnets are used
(c).
Observing the specimen naked eyes can be used. Only micrographs can
be observed
(iii) Who is the biologist who put forward the following fact regarding cell theory.
“All
cells arise from pre-existing cells.”
Rudolff
Virchow
(iv) Name
two features possessed by all living cells.
Surrounded
by a plasma membrane
Carry DNA
as genetic material
(C) (i) What are the differences in genetic material found in prokaryotes and eukaryotes?
Prokaryotes
Eukaryotes
Circular
DNA Linear
DNA
Not
associated with protein Associated with protein
(ii) Name three common features found in bacteria, archaea, and cyanobacteria.
(a) Circular
DNA
(b)
Not associated with protein
(c) 70s
ribosomes
(iii) Given below are some of the chemicals found as cell wall materials in various organisms. Name the organism that possesses them in front of the chemical compound.
(a) Peptidoglycan-
Cyanobacteria
(b)
Chitin- Fungi
(c)
Protein – Archi bacteria
(iv) Name 2 differences between the flagella of bacteria and the flagella of Euglena.
flagella
of bacteria flagella of Euglena
No
microtubules in
bacterial flagella microtubules are present in flagella of Euglena
Diameter
is 20nm in
bacterial flagella Diameter is 200 nm in flagella of Euglena
No comments:
Post a Comment