BIO 101 Study Mode

Try this quiz in CBT Mode
BIO 101 in CBT Mode

Please share this quiz link to your friends, they might need it!

Quiz link
Share BIO 101 with your friends
Share to WhatsApp Share Quiz CBT mode Study mode copy link
https://quizzerweb.com.ng/quiz?q=BIO%2B101&id=112

Join Discuss Share Question Share to WhatsApp
Question 31 BIO 101 | LAUTECH 100L
A
only free nucleic acid aggregates  
B
membrane bound nucleo proteins lying embedded in the cytoplasm  
C
gene containing nucleoproteins condensed together in loose mass  
D
nucleoprotein in direct contact with the rest of the cell substance.  
Explanation.
Share Answer Protists include all unicellular and colonial eukaryotes except those of green and red algae. They are broadly divided into three groups – photosynthetic, slime moulds and protozoans. The protistan cells are typically eukaryotic having membrane bound organelles like mitochondria, chloroplasts, Golgi bodies, endoplasmic reticulum, nucleus etc. Nucleus is well defined. Protists can be uninucleate, binucleate or multinucleate. The genetic material is linear DNA, enclosed by nuclear envelope, complexed with proteins and organised into distinct chromosomes.

Correct Option:
B
Join Discuss Share Question Share to WhatsApp
Question 32 BIO 101 | LAUTECH 100L
A
overall similarities  
B
utilitarian system  
C
habits of plants  
D
common evolutionary descent.  
Explanation.
Share Answer Phylogenetic systems of classification bring out evolutionary relationships of organisms. Phylogeneti <br />systems of classification came into existence after acceptance of doctrine of evolution and natural selection propounded by Charles Darwin in his book “On the origin of Species” by means of Natural Selection. Darwin had put forward the view that the present day plants/animals originated from some ancestral ones after undergoing some periodical changes. <br />So the phylogenetic classification is based on the evolutionary descent of a group of organisms and the relationships are depicted through a phylogram and a cladogram.

Correct Option:
D
Join Discuss Share Question Share to WhatsApp
Question 33 BIO 101 | LAUTECH 100L
A
single stranded RNA  
B
double stranded DNA  
C
proteinaceous  
D
double stranded RNA.  
Explanation.
Share Answer Tobacco Mosaic Virus is a ribovirus and contains single stranded RNA. It was proved by the experiments ofFrankel Conart that RNA is the genetic material in this virus. It does not contain any DNA and is composed of 6 % RNA surrounded by a hollow cylinder of portion subunits. <br />Double stranded RNA is found in Reovirus and Tumor virus. <br />Retroviruses have two copies of single stranded RNA.

Correct Option:
A
Join Discuss Share Question Share to WhatsApp
Question 34 BIO 101 | LAUTECH 100L
A
motile on surface of bacteria  
B
non-motile  
C
motile on surface of plant leaves  
D
actively motile in water.  
Explanation.
Share Answer The tailed bacteriophages contain a hollow helical tail which serves both as cell attachment organ and as a tube that facilitates the entry of nucleic acid into the host cell. The tail consists of tail plate and the caudal fibres.

Correct Option:
A
Join Discuss Share Question Share to WhatsApp
Question 35 BIO 101 | LAUTECH 100L
A
bryophytes  
B
prokaryotes  
C
protista  
D
fungi.  
Explanation.
Share Answer According to Whittaker’s system, blue green algae are placed in kingdom monera which is the kingdom of prokaryotes. This is because they lack nucleus, DNA is naked and is folded variously to form nucleoid in the centre of the protoplast. In addition they lack membrane bound organelles including endoplasmic reticulum and ribosomes are of 70s type. So they are included under prokaryotes.

Correct Option:
B
Join Discuss Share Question Share to WhatsApp
Question 36 BIO 101 | LAUTECH 100L
A
order  
B
taxonomy  
C
species  
D
genes.  
Explanation.
Share Answer Taxon refers to all the categories in the taxonomic hierarchy. It may be a kingdom, class, order, family, genus or species. It is any level of grouping of organisms. Each of these categories has been divided further into intermediate categories like subkingdom, subdivision, superclass, subgenus, subspecies etc. This term was coined by ICBN in 1956.

Correct Option:
B
Join Discuss Share Question Share to WhatsApp
Question 37 BIO 101 | LAUTECH 100L
A
double helical DNA  
B
RNA  
C
single helix DNA  
D
none of these.  
Explanation.
Share Answer Influenza viruses are spherical in shape measuring about 800-1200A in diameter. It has a protein capsid that encloses a single stranded RNA. The single stranded RNA is generally linear and constitutes about 10% of the virus particle. RNA is genetic material in other viruses like poliomyelitis, foot and mouth disease virus and tobacco mosaic virus etc.

Correct Option:
B
Join Discuss Share Question Share to WhatsApp
Question 38 BIO 101 | LAUTECH 100L
A
plantae  
B
protista  
C
monera  
D
fungi.  
Explanation.
Share Answer R.H. Whittaker had proposed a five kingdom system of biological classification in 1969. It is based on complexity of cell structure, body organization and mode of nutrition. The kingdom monera includes all prokaryotes. They are basically unicellular with peptidoglycan in cell wall. Naked circular DNA coiled to form nucleoid without association with histones, ribosomes 70s, thylakoids present in photoautotrophs but other membrane bound organelles are absent. <br />These are heterotrophic, phototrophic or chemotrophic in their mode of nutrition. The blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria are all unicellular prokaryotes so they are included in the kingdom monera.

Correct Option:
C
Join Discuss Share Question Share to WhatsApp
Question 39 BIO 101 | LAUTECH 100L
A
Engler & Prantl  
B
Bentham & Hooker  
C
Bessey  
D
Hutchinson.  
Explanation.
Share Answer Bentham and Hooker in their monumental work Genera Plantarum (1862-1883) have provided elaborate keys for the easy identification of202 natural orders and genera. Engler and Prantl wrote Die naturlichen pflanzen familien. Huchinson wrote a book titled “The Families of Flowering Plants.”

Correct Option:
B
Join Discuss Share Question Share to WhatsApp
Question 40 BIO 101 | LAUTECH 100L
A
natural system  
B
phylogenetic system  
C
artificial system  
D
synthetic system.  
Explanation.
Share Answer There are three systems of classification – artificial, natural and phylogenetic. In the natural system of classification the organisms are arranged on the basis of all known taxonomic characters instead of one or first few. These include morphological, anatomical, cytological, and physiological and biochemical characters of the organisms. <br />The artificial system is based on one or a few characters that are easily observable. The phylogenetic system tries to organize organisms on the basis of their genetic and phylogenetic relationships besides taxonomic characters.

Correct Option:
A
Previous Page Next Page
Question Map