Practice Objective test questions - general science mcq Online Quiz (set-1) For All Competitive Exams

Q-1)   The normal temperature of the human body is

(a)

(b)

(c)

(d)

Q-2)   Alternate type of phyllotaxy is found in

(a)

(b)

(c)

(d)

Q-3)   Consider the following statements :
  1. Food prepared by plant is transported to different parts of plant through phloem.
  2. Water and minerals in plants are transported through xylem.
  3. The cell wall of xylem cell is rich in lignin.
Which of the statements given above are correct?

(a)

(b)

(c)

(d)

Explanation:

The food prepared by plant is transported through phloem, while water and minerals are transported through xylem whose cell wall is rich in lignim

Q-4)   Which mineral nutrients are called critical element for crops?

(a)

(b)

(c)

(d)

Q-5)   Study the following statements :
  1. The term ‘Cell’ was first coined by Robert Hooke.
  2. Plant cells are generally without lysosomes.
  3. Cell wall present only in animal cells.
Which of the statement(s) given above is/are true?

(a)

(b)

(c)

(d)

Explanation:

Presence of Cell wall is a characteristic feature of plant cells only. Animals lack cell wall.

Q-6)   Which of the following plant is found to have minimum transpiration ?

(a)

(b)

(c)

(d)

Explanation:

Cactus is a xerophytic plant and have sunken stomata to reduce the rate of transpiration, confined to lower epidermis.

Q-7)   The toxic effect of CO is due to its greater affinity for haemoglobin as compared to O2 approximately by

(a)

(b)

(c)

(d)

Q-8)   Nucleated part of nerve cell is called

(a)

(b)

(c)

(d)

Q-9)   Study the following statements :
  1. Control room of the cell is Nucleus
  2. Nucleus was discovered by Robert Brown.
  3. Nuclear envelope is absent in bacteria.
Which of the statement(s) given above is/are correct about nucleus?

(a)

(b)

(c)

(d)

Explanation:

The nucleus is the control room of the cell as it contains the genome which gets expressed to give the phenotype.

The nucleus of the cell was discovered by Robert Brown in 1833. Bacteria are prokaryotes, they lack the nuclear envelope and their genetic material lies in the cell cytoplasm.

Q-10)   Which of the following element is a constituent of protein ?

(a)

(b)

(c)

(d)