Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

Freshly liberated seeds of Erianthus hiemalis do not germinate due to

  1. Occurrence of impermeable seed coat

  2. Immaturity of embryo

  3. Occurrence of inhibitors

  4. Absence of growth hormones
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Immaturity of embryo prevents germination of freshly liberated seeds of Erianthus hiemalis. 

So, the correct answer is 'Immaturity of embryo'

Multiple choice biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

Choose the correct answers from the alternatives given.
The following are requirement of seeds for germination to occur:

  1. oxygen for increased metabolism

  2. adequate temperature

  3. adequate water

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Seed germination requires oxygen for cellular respiration, an adequate temperature for enzymatic activity, and water for metabolic activation and imbibition.

Multiple choice biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

Choose the correct answer from the alternatives given.
A nail was driven into the trunk of a tree at a point 1.5 meters above the soil level. After three years, the nail will

  1. remain where it was

  2. move side ways

  3. move up

  4. move down
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trees grow in height from the apical meristems located at the tips of branches and the main stem. A nail driven into the trunk will remain at the same height as the tree grows in girth, not in height, at that specific point.

Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders

Insufficient quantity of vitamins in diet affect directly formation of all except 

  1. NAD

  2. FAD

  3. Flavin mononucleoide

  4. Lipids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nicotinamide adenine dinucleotide is a co-enzyme. It is required for the fundamental biological process that make life possible. It is called dinucleotide because it consists of two nucleotides joined together through their phosphate groups.

So, the correct option is 'NAD'.

Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders need for nutrients

Which of the following vitamins are water soluble?

  1. Vit A, Vit B

  2. Vit B, Vit C

  3. Vit C, Vit D

  4. Vit A, Vit C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Vitamins which can dissolve in water are called water-soluble vitamins. Water-soluble vitamins include vitamin-C and vitamin-B because they remove the toxins from our body through urine. Therefore, they are not stored in our body and should be taken on a daily basis through the food we eat.
So, the correct option is 'Vit-B, Vit-C'
Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders

Vitamins are - 

  1. Inorganic substances and can't be synthesized by animals.

  2. Inorganic substances and can be synthesized by animals.

  3. Organic substances which cannot mostly be synthesized by animals.

  4. Organic substances which can mostly be synthesized by animals.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Vitamins are the organic substances that can not be synthesized by animals and obtained through diet. Examples are vitamin A, B, C, D, E, K.
So, the correct option is C.
Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders need for nutrients

Which of the following vitamins is an main antioxidant?

  1. $A$
  2. $B _6$
  3. $D$
  4. $K$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three major antioxidant vitamins are beta-carotene, vitamin C and vitamin E. Beta carotene is an antioxidant that gets converted to vitamin A and plays a very important role in health. It's responsible for the red, yellow, and orange coloration of some fruits and veggies.

Vitamin A acts as an antioxidant within the body that scavenges harmful oxygen free radicals.
So, the correct answer is 'A'.

Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders need for nutrients

Identify the mis-matched pair.

  1. Fatigue, mental depression - Biotin

  2. Delayed dentition, knock-knees - Tocoferol

  3. Diarrhoea, loss of leucocytes - Folic acid

  4. Photophobia, red and sore tongue - Riboflavin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Delayed dentition and knock-knees are symptoms of vitamin D deficiency (rickets), not tocopherol (vitamin E). The other pairs correctly link deficiency symptoms with their respective vitamins.

Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals digestive disorders need for nutrients

Which is not shown by vitamins?

  1. Digestion

  2. Metabolism

  3. Growth

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vitamins are accessory food factors, which are required in small quantity for controlling metabolism and body functioning. Vitamins are of two types- fat soluble (A, D, E, K) and water soluble (B and C). Vitamins like minerals are not digested but directly absorbed from ingested food. They play role in metabolism and growth.