Biology Questions

Q:

Phosphorescence is a phenomenon associated with which algal division?

A) Dinoflagellates B) Brown algae
C) Red algae D) Euglenophytes
 
Answer & Explanation Answer: D) Euglenophytes

Explanation:

Phosphorescence is a phenomenon associated with an algal division called euglenophytes. 

 

Phosphorescence is a phenomenon when an object is capable of releasing photons of light at a longer wavelength in response to absorbing light of a shorter wavelength. The object releasing the light only releases the light after some time has passed since it absorbed the light of a short wavelength.

 

Euglenophytes are single-celled plant-like protists that have no cell wall.

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , GATE
Job Role: Analyst , Bank Clerk , Bank PO

3 1407
Q:

Which of the following is a healthy fat?

A) polyunsaturated fat B) enriched fat
C) trans fat D) saturated fat
 
Answer & Explanation Answer: A) polyunsaturated fat

Explanation:

Polyunsaturated fats are healthy fats whcih we can get from eating greeny leaf vegetables, fish and some seeds that are helpful in brain functioning, nutrient rich blood, hair growth, etc...

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

4 1406
Q:

A protein is being assembled when

A) RNA is being translated B) DNA is being translated
C) RNA is being transcribed D) DNA is being transcribed
 
Answer & Explanation Answer: A) RNA is being translated

Explanation:

A protein is being assembled when RNA is being translated. This process goes as, by the process of transcription first DNA is is converted to mRNA. And then by the process of translation this mRNA is converted to proteins.

=> DNA ----> mRNA ----> Proteins.

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

4 1406
Q:

In human body, the cell growth and differentiation are highly controlled and regulated, but in cancer cells

A) there is breakdown of these regulatory mechanisms leading to formation of benign and malignant tumors B) controlled cell divisionand over-production of genetic material occur  
C) RNA is mutated and produced in less amount D) DNA is mutated and produced in less amount
 
Answer & Explanation Answer: A) there is breakdown of these regulatory mechanisms leading to formation of benign and malignant tumors

Explanation:

In cancer cells, there is breakdown of these regulatory mechanisms. Normal cells show a property called contact inhibition by virtue of which contact with other cells inhibits their uncontrolled growth. Cancer cells appears to have lost this property. As a result of this, cancerous cells just continue to divide giving rise to masses of cells called tumors. Tumors are of two types: benign and malignant.

 

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: Bank Exams

3 1402
Q:

The energy in most ecosystems comes from

A) Water B) Carbon dioxide
C) Sun D) Soil
 
Answer & Explanation Answer: C) Sun

Explanation:

The energy in most ecosystems comes from sun light.

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

4 1396
Q:

Polyploidy is involved in which of the following examples?

A) XYY males B) Some plants alternate between haploid and diploid phases
C) XO females D) A normal watermelon has 22 chromosomes but seedless watermelons have 33 chromosomes
 
Answer & Explanation Answer: D) A normal watermelon has 22 chromosomes but seedless watermelons have 33 chromosomes

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

2 1396
Q:

Innate immune system defenses include

A) phagocytosis B) B cells
C) plasma cells D) T cells
 
Answer & Explanation Answer: A) phagocytosis

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

1 1392
Q:

The primary goal of conservation biology is to

A) counter the loss of biodiversity B) estimate the total number of species that exist
C) integrate human culture back into nature D) catalogue species
 
Answer & Explanation Answer: A) counter the loss of biodiversity

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

1 1389