Biology General Knowledge (GK) | Aptitude | Quiz Questions and Answers

Biology General Knowledge(GK)|Aptitude|Quiz Questions and Answers:

Neurospora is used as genetic material because

A.      it has a short life cycle of 10 days

B.      the product of single meiosis can be easily analyzed

C.      meiotic products are linearly arranged in the form of ordered tetrads

D.      is a diploid fungus

Ans: it has a short life cycle of 10 days

phloem is a tissue found in

A.      reproductive organs of animals

B.      plants

C.      insects

D.      mammals

Ans: plants

Most of the red, blue, and purple colors of plants are due to a pigment called

A.      anthocyanin

B.      carotene

C.      chlorophyll

D.      xanthophylls

Ans: anthocyanin

The placenta is the structure formed

A.      by the union of fetal and uterine tissue

B.      by fetus only

C.      by fusion of germ layers

D.      None of these

Ans: by the union of fetal and uterine tissue

Pollination is best defined as

A.      transfer of pollen from anther to the stigma

B.      germination of pollen grains

C.      growth of pollen tube in ovule

D.      visiting flowers by insects

Ans: transfer of pollen from anther to the stigma

Movement of the cell against concentration gradient is called

A.      osmosis

B.      active transport

C.      diffusion

D.      passive transport

Ans: active transport

Photosynthesis generally takes place in which parts of the plant?

A.      Leaf and other chloroplast bearing parts

B.      steam and leaf

C.      Roots and chloroplast bearing parts

D.      Bark and leaf

Ans: Leaf and other chloroplast bearing parts

Ordinary table salt is sodium chloride. What is baking soda?

A.      Potassium chloride

B.      Potassium carbonate

C.      Potassium hydroxide

D.      Sodium bicarbonate

Ans:Sodium bicarbonate

Ozone hole refers to

A.      hole in ozone layer

B.      decrease in the ozone layer in troposphere

C.      decrease in thickness of ozone layer in stratosphere

D.      increase in the thickness of ozone layer in troposphere

Ans: decrease in thickness of ozone layer in stratosphere

Plants synthesize protein from

A.      starch

B.      sugar

C.      amino acids

D.      fatty acids

Ans: amino acids

Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

A.      By cyanobacteria

B.      By electrical discharges in the atmosphere

C.      By industrially synthesized fertilizer

D.      By denitrification

Ans:    By denitrification

Ptyalin is an enzyme produced in the

A.      salivary glands

B.      pituitary glands

C.      thyroid glands

D.      pancreas

Ans: salivary glands

Plants absorb most part of the water needed by them through their

A.      embryonic zone

B.      growing point

C.      root hairs

D.      zone of elongation

Ans: root hairs

Photo-oxidation is

A.      photorespiration

B.      photolysis

C.      light and oxygen-induced breakdown

D.      All of the above

Ans: All of the above

Plant development is influenced by

A.      quality of light only

B.      quality and quantity of light

C.      quality and duration of light

D.      quality, quantity, and duration of light

Ans: quality, quantity, and duration of light

Prokaryotic cells lack

A.      nucleolus

B.      nuclear membrane

C.      membrane bound by organelles

D.      All of these

Ans: All of these

Photosynthesis takes place faster in

A.      yellow light

B.      white light

C.      red light

D.      darkness

Ans: white light

Plants absorb dissolved nitrates from soil and convert them into

A.      free nitrogen

B.      urea

C.      ammonia

D.      proteins

Ans: free nitrogen

One of the following is not a function of bones.

A.      Place for muscle attachment

B.      Protection of vital organs

C.      Secretion of hormones for calcium regulation in blood and bones

D.      Production of blood corpuscles

Ans: Secretion of hormones for calcium regulation in blood and bones

Mutation is

A.      a factor responsible for plant growth

B.      a change which affects the offspring of F2 generation only

C.      a change that is inherited

D.      a change which affects the parents

Ans: a change that is inherited

Nucleus, the genetic material containing a rounded body in each cell, was first discovered in 1831 by

A.      Robert Hooke

B.      Robert Brown

C.      Rudolf Virchow

D.      Theodore Schwann

Ans: Robert Brown

Neurospora is used as genetic material because

A.      it has a short life cycle of 10 days

B.      the product of single meiosis can be easily analyzed

C.      meiotic products are linearly arranged in the form of ordered tetrads

D.      is a diploid fungus

Ans:it has a short life cycle of 10 days

Phloem is a tissue found in

A.      reproductive organs of animals

B.      plants

C.      insects

D.      mammals

Ans:plants

N2 content is kept constant in the biosphere due to

A.      N2 fixation

B.      industrial pollution

C.      nitrogen cycle

D.      absorption of N2

Ans: nitrogen cycle

Other than spreading malaria, anopheles mosquitoes are also vectors of

A.      dengue fever

B.      filariasis

C.      encephalitis

D.      yellow fever

Ans:filariasis

Placenta is the structure formed

A.      by the union of foetal and uterine tissue

B.      by foetus only

C.      by fusion of germ layers

D.      None of these

Ans:by the union of foetal and uterine tissue

The most common disease of poultry in India is

A.      fowl pox

B.      tick fever

C.      Ranikhet

D.      coryza

Ans:Ranikhet

Our major foods, fibers, spices, fruits, and beverage crops are

A.      flowering plants

B.      gymnosperms plants

C.      pteridophytes

D.      bryophytes

Ans: flowering plants

Movements due to light are shown by

A.      flowering plants

B.      lower plants

C.      all land plants

D.      all the plants

Ans: flowering plants

Radish is a

A.      bulb

B.      conn

C.      modified root

D.      tuber

Ans: modified root

Rainwater helps to increase the ____ to some extent.

A.      phosphorous contents

B.      nitrogen contents

C.      calcium contents

D.      potash contents

Ans: calcium contents

Radioactivity is a phenomenon of the spontaneous emission of

A.      protons (alpha particles)

B.      electrons (beta particles)

C.      gamma rays (short wave electromagnetic waves)

D.      All of the above

Ans: All of the above

Photosynthesis is a process

A.      reductive and exergonic

B.      reductive and catabolic

C.      reductive, endergonic and catabolic

D.      reductive, endergonic and anabolic

Ans:reductive, endergonic and anabolic

Norepinephrine increases

A.      respiration

B.      urine production

C.      saliva production

D.      blood pressure

Ans: blood pressure

Monotremes are unique mammals because they

A.      posses hair

B.      give birth to live young

C.      secret milk in a pouch

D.      lay eggs

Ans: lay eggs

Poison glands of snakes are homologous to

A.      electric organs of fishes

B.      stings of rays

C.      sebaceous glands of mammals

D.      salivary glands of vertebrates

Ans: salivary glands of vertebrates

Night blindness is caused by lack of which vitamin?

A.      Vitamin A

B.      Vitamin B

C.      Vitamin C

D.      Vitamin D

Ans: Vitamin A

Monocot root differs from dicot root in having

A.      open vascular bundles

B.      scattered vascular bundles

C.      well developed pith

D.      radially arranged vascular bundles

Ans:well developed pith

Radical vascular bundles are those in which

A.      xylem is surrounded by phloem

B.      phloem is surrounded by xylem

C.      xylem and phloem occur on the same radius

D.      xylem and phloem occur on the different radii

Ans: xylem and phloem occur on the different radii

The normal adult human male has

A.      10 gram of haemoglobin/100 gram of blood

B.      14 gram of haemoglobin/100 gram of blood

C.      18 gram of haemoglobin/100 gram of blood

D.      24 gram of haemoglobin/100 gram of blood

Ans:14 gram of haemoglobin/100 gram of blood

out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

A.      Lipids are maximum

B.      Carbohydrates are minimum

C.      Carbohydrates are maximum

D.      All three are in equal proportion

Ans: Carbohydrates are minimum

Myopia is connected with

A.      ears

B.      eyes

C.      lungs

D.      None of these

Ans: eyes

Osmosis is the flow of solution from a higher concentration to a solution of lower concentration through a semi-permeable membrane. What is incorrect in this statement?

A.      Exact concentration of the solution is not given

B.      Character of the semi-permeable membrane is not given

C.      The flow of solution is not possible through the semi-permeable membrane

D.      All are incorrect

Ans: The flow of solution is not possible through semi-permeable membrane

Ramapithecus and Cro-Magnon man are considered

A.      ancestors of modern man

B.      ancestors of monkey

C.      ancestors of lion

D.      None of the above

Ans: ancestors of modern man