Biology Questions

Q:

Which of the following is the largest group of animals?

A) Nematoda B) Porifera
C) Arthropoda D) Mollusca
 
Answer & Explanation Answer: C) Arthropoda

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Q:

Variable number of tandem repeats (VNTRs) in the DNA molecule are highly useful in

A) Recombinant DNA technology B) Monoclonal antibody production
C) Stemcell culture D) DNA fingerprinting
 
Answer & Explanation Answer: D) DNA fingerprinting

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Q:

Translation of the dna sequence AAGCTGGGA would result in

A) a DNA strand with the base sequence TTCGACCCT B) an mRNA strand with the sequence TTCGACCCT
C) a sequence of three amino acids linked by peptide bonds D) an mRNA strand with the sequence UUGCACCCU
 
Answer & Explanation Answer: A) a DNA strand with the base sequence TTCGACCCT

Explanation:

Translation_of_the_dna_sequence_AAGCTGGGA_would_result_in_a_DNA_strand_with_the_base_sequence_TTCGACCCT1557489837.jpg image

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Q:

Cutaneous respiration occurs in

A) Cockroach B) Salamander
C) Crab D) Parrot
 
Answer & Explanation Answer: B) Salamander

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Q:

Oath taken by medical graduates is given by

A) Aristotle B) Theophrastus
C) Hippocrates D) Darwin
 
Answer & Explanation Answer: C) Hippocrates

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Q:

Function of Leghaemoglobin in nitrogen fixation _____

A) Absorption of oxygen B) Nutrion of bacteria
C) Absorption of light D) All
 
Answer & Explanation Answer: A) Absorption of oxygen

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Q:

In plants, exchange of gases takes place through

A) Stomata B) Palisade tissue
C) Spongy tissue D) mid rib
 
Answer & Explanation Answer: A) Stomata

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Q:

Pollination is best defined as

A) growth of pollen tube in ovule B) visiting flowers by insects
C) germination of pollen grains D) transfer of pollen from anther to stigma
 
Answer & Explanation Answer: D) transfer of pollen from anther to stigma

Explanation:

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part of the flower, known as the stigma. In order for pollination to be successful, the pollen grains transferred must be from a flower of the same species.

 

After the pollen grains land on the stigma, they create a pollen tube through the length of the style or stalk connecting the stigma and ovary. Once the pollen tube is complete, the pollen grain will send sperm cells from the grain down to the ovary. When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed. The seed will then be released from the parent plant and will be able to grow into a plant and continue the reproductive cycle using the method of pollination.

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