Questions

Q:

Which of the following is an example of polygenic inheritance?

A) Skin pigmentation in humans B) Huntingtonʹs disease in humans
C) White and purple flower color in peas D) The ABO blood groups in humans
 
Answer & Explanation Answer: A) Skin pigmentation in humans

Explanation:

Polygenic inheritance involves the determination of a particular phenotypic characteristic by many genes, called polygenes(group of genes influencing a quantitative characteristic), each having a small effect individually.

Height and skin colour in humans are examples of Polygenic characters.

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Q:

Which of the following mixtures is not a colloid?

A) Sugar water B) Milk
C) Paint D) Fog
 
Answer & Explanation Answer: A) Sugar water

Explanation:

Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.

 

Sugar water is not a colloid and it is a solution in which we can separate them.

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Q:

What type of bone is a phalanx?

A) Short bones B) Joints
C) Long bones D) None of the above
 
Answer & Explanation Answer: C) Long bones

Explanation:

The phalanges or a phalanx are/is digital bones in the hands and feet of most vertebrates. In primates, the thumbs and big toes have two phalanges while the other digits have three phalanges. The phalanges are classed as long bones.

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Q:

Which datatype in c language has least storage?

A) char B) double
C) int D) float
 
Answer & Explanation Answer: A) char

Explanation:

Data types are used for declaration of variables in computer programming languages. These determine the type and size of data associated with variables.

Data types examples - int, char, float, etc...

 

char datatype is the least storage data type with 1 byte.

int with 2 or 4 bytes.

float with 4 bytes

double with 8 bytes.

datatype_in_c_language_has_least_storage1562156854.png image

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Q:

What is the official language of African Development Bank

A) English B) French
C) (a) and (b) D) None of these
 
Answer & Explanation Answer: C) (a) and (b)

Explanation:
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Q:

Which discovery is attributed to Phoebus Levene?

A) identification of ribose and deoxyribose B) recognition of RNA as DNA’s messenger
C) extraction and observation of DNA D) construction of an accurate DNA model
 
Answer & Explanation Answer: A) identification of ribose and deoxyribose

Explanation:

Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA. He is who studied the structure and function of nucleic acids.

 

The discovery of Identification of Ribose and Deoxyribose is attributed to Phoebus Levene.

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Q:

In the thermite process, the reducing agent is

A) Chlorine B) Aluminium
C) Silicon D) Iron
 
Answer & Explanation Answer: B) Aluminium

Explanation:

In the thermite process, the reducing agent is Aluminium.

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Q:

The lining of the marrow cavity is

A) Endosteum B) Sarcolemma
C) Episteum D) Periosteum
 
Answer & Explanation Answer: A) Endosteum

Explanation:

The marrow cavity is also known as the medullary cavity. It is the central cavity of bone shafts where adipose tissue is stored. It is lined with a thin, vascular membrane called endosteum.

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