Tag: biology

Questions Related to biology

The science of naming plants is known as

biology biodiversity and its classifications binomial nomenclature nomenclature of organisms naming of the organisms nomenclature in classification

  1. Classification

  2. Identification

  3. Nomenclature

  4. Taxonomy

Show answer
Correct Option: C
Explanation:

The art of naming an object is, in fact, a science called nomenclature. Binomial nomenclature is followed worldwide to identify an organism. Every organism has a scientific name, which is a combination of genus and species. Most of these names are in the Latin language. For example, the scientific name of human is Homo sapiens and that of frog is Rana tigrina.

Pollen grains of flower pollinated by wind or insects are not ............

biology pollination structure of male and female reproductive structures structure of ovule gynoecium

  1. Rough and sticky

  2. Large and showy

  3. Rough and dry

  4. Smooth and dry

Show answer
Correct Option: B
Explanation:

Pollen grains to be carried by wind as well as by insects will not be heavy in weight or showy. This is because it causes the wind as well as insects tough to perform pollination. They prefer light weight as well as winged ones.

Wind pollinated plants differ from insect pollinated plants in having ....

biology reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Small petals and sticky pollen

  2. Small coloured petals and heavy pollen

  3. Coloured petals and large pollen

  4. No petals and light pollen

Show answer
Correct Option: D
Explanation:

Wind pollinated plants will have light weight pollens which are mostly winged and are thus easy to be carried away by wind. Whereas the plants where the pollinating agents are insects, the petals will be bright and scented so that the insects get attracted to it and acts as pollinator.

A very close relationship between flower and pollinating agent is best exhibited by 

biology pollination structure of male and female reproductive structures structure of ovule gynoecium

  1. Yucca

  2. Avena

  3. Salmalia

  4. Pisum

Show answer
Correct Option: A
Explanation:

A very close relationship between flower and pollinating agent is best exhibited by Yucca as there is a mutually rewarding relationship between Yucca plant and species of moth. They cannot complete their life cycle without each other. The moth lays egg in the locules of the ovary. The larva uses some of the seeds as food. In turn, the flowers are pollinated by the moth. 

So, the correct answer is option A.

In Salvia the pollination is affected by  

biology pollination structure of male and female reproductive structures structure of ovule gynoecium

  1. Water

  2. Air

  3. Animals

  4. Insects

Show answer
Correct Option: D
Explanation:

Nectar is produced in saliva to lure pollinators such as insects and the process of pollination continues from one flower to the other flower and so on.

So the correct option is 'Insects.'

Use of transgenic plants as biological factories for the production of special chemicals is called as

biology option b: biotechnology and bioinformatics pcr cutting, insertion and ligation of dna gene cloning procedure

  1. Molecular farming

  2. Molecular genetics

  3. Molecular mapping

  4. Dry farming

Show answer
Correct Option: A
Explanation:
Molecular genetics is the study of structure and function of gene and regulation of its expression. It includes isolation and characterization of genes and identification of regulatory sequences. 
Molecular farming is transfer of genes of industrial importance to plants and animals for production of chemicals, for example production of transgenic animals for increased milk production. 
Molecular mapping is identification of loci of genes and their relative distance on chromosomes; DNA finger printing and genomic imprinting are most common techniques used for the purpose. 
Dry farming refers to crop production without irrigation, i.e., under limited moisture conditions; it is practiced for dry lands where water availability is low. 

Desired genes have been introduced into transgenic animals to obtain large-scale production of useful biological products encoded by these genes. This approach is generally referred to as _____________.

biology option b: biotechnology and bioinformatics pcr cutting, insertion and ligation of dna gene cloning procedure

  1. Hybridoma technology

  2. Molecular farming

  3. Gene therapyx

  4. Downstream processing

Show answer
Correct Option: B

A set of genes of cDNA is immobilized on a glass slide and used in transcriptome studies is called 

biology option b: biotechnology and bioinformatics pcr cutting, insertion and ligation of dna gene cloning procedure

  1. Proteome

  2. Microarray

  3. DNA chip

  4. Genome

Show answer
Correct Option: B
Explanation:

The transcriptome is the sum of all of its RNA transcripts. The information content of an organism is recorded in the DNA of its genome and expressed through transcription. A microarray is a laboratory tool used to detect the expression of thousands of genes at the same time. DNA microarray is microscopic glass slides that are printed with thousands of tiny spots in defined positions with each spot containing a known cDNA. The cDNA is made immobilized on a glass slide.

So, the correct answer is 'Microarray'.

Recently government of India has allowed mixing of alcohol in petrol. What is amount of alcohol permitted for mixing in petrol?

biology option b: biotechnology and bioinformatics pcr cutting, insertion and ligation of dna gene cloning procedure

  1. $25\%$

  2. $10-15\%$

  3. $10\%$

  4. $5\%$

Show answer
Correct Option: D
Explanation:

The amount is 5%.

Correct answer-D

A probe which is a molecule used to locate specific sequences in a mixture of DNA or RNA molecules could be __________________.

biology option b: biotechnology and bioinformatics pcr cutting, insertion and ligation of dna gene cloning procedure

  1. A single stranded RNA

  2. A single stranded DNA

  3. Either RNA or DNA

  4. Can be ssDNA but not ssRNA

Show answer
Correct Option: B
Explanation:

The molecular probes are usually single-stranded places of DNA (sometimes RNAs) labeled with radioisotopes such as phosphorus- 32. Molecular probes are available for many genetic disorders such as Duchenne muscular dystrophy, cystic fibrosis, Tay-Sachs disease.