Biology Questions and Answer. Ask all your queries here and get answered by Experts.

Cellulose is the major component of cell walls of?

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to?

Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom?

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup?

Domain Eukarya includes how many kingdoms (w.r.t. six kingdom system)?

The protein coat called capsid made of small subunits called capsomeres are present in?

The sex organs are absent, but plasmogamy is brought about by fusion of two vegetative or somatic cells of different genotypes. It is the feature of?

Position of bacteria in the kingdom system of classification proposed by Linnaeus is?

During favourable conditions bacteria mainly reproduce by

Clianostat is associated with :- 

What are the four stages of binary fission in amoeba?

Rita performs two set of experiments to study the length of the foam formed which are as follows:
Set I: she takes 10 ml of distilled water in test tube “A” and adds 5-6 drops of liquid soap in it and shakes the test tube vigorously.
Set II: she takes 10 ml of distilled water in a test tube “A” and adds 5-6 drops of liquid soap with half spoonful of CaSO 4 in it and shakes the test tube. Write your observation and reason

What do you observe when you drop a few drops of acetic acid to a test tube containing:

(a) Phenolphthalein
(b) Distilled water
(c) Universal indicator
(d) Sodium hydrogen carbonate

Define phytohormones and Give two functions of each: (i) Auxin (ii) Gibberellins (iii) Abscissic acid (iv) Ethylene

Define bio fortification. Write the name of wheat variety with high protein content.

What is predation and its role in a biotic community?

Mention the genes that are associated with development of cancer?

Lady bird (Beetle with red and black marking) is used as biological control of ?

What is Human excretory system? explain?

What is apomixis and its importance?

Write briefly about genetic diversity.

Describe Verhulst- Pearl logistic growth.

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?

1.Bacillus

2.Pseudomonas

3.Mycoplasma

4.Nostoc

What do you mean by convergent evolution?

What do you mean by metastasis? How is loss of contact inhibition and loss of adhesiveness related to cancerous cells?

Describe Verhulst- Pearl logistic growth.

Explant is required to be disinfected before placing in culture. This is done by?

You overheard your mother telling an expecting mother to avoid breastfeeding the newly born for first two three days after birth as the yellowish fluid secreted by the mother is a waste fluid and should be discarded. Will you support your mother’s opinion?

Name the microbes that are the source for bioactive molecule cyclosporin A and statin respectively?

Explain the mode of entry of AIDS virus into host cell and its release from it?

Explain Chargaff’s rule for a double stranded DNA?

Which one of the following acts as a physiological barrier to the entry of microorganisms in human body?

1. Skin

2. Epithelium of Urogenial tract

3. Tears

4. Monocytes

Of the total incident solar radiation the proportion of PAR is?

1. More than 80%

2. About 70%

3. About 60%

4. Less than 50%

The gametophyte is not an independent, free-living generation in 1. Pinus 2. Polytrichum 3. Adiantum 4. Marchantia

The gametophyte is not an independent, free-living generation in 1. Pinus 2. Polytrichum 3. Adiantum 4. Marchantia

What was the most significant trend in the evolution of modern man (Homosapiens) from his ancestors? 1. Increasing brain capacity 2. Upright posture 3. Shortening of jaws 4. Binocular vision

Which one of the following plasma proteins is involved in the coagulation of blood?

1. Fibrinogen

2. An albumin

3. Serum amylase

4. A globulin

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of ?

When two unrelated individuals or lines are corssed, the performance of F1 hybrid is often superior to both its parents. This phenomenon is called?

Which one of the following is categorised as a parasite in true sense?

1. The cuckoo (koel) lays its egg in crow's nest

2. The female Anopheles bites and sucks blood from humans

3. Human foetus developing inside the uterus draws nourishment from the mother

4. Head louse living on the human scalp as well as laying eggs on human hair

At which stage of HIV infection does one usually show symptoms of AIDS?

A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

1. Vagina to uterus

2. Testes to epididymis

3. Epididymis to vas deferens

4. Ovary to uterus

Which one of the following enzymes carries on the initial step in the digestion of milk in humans?

1.Trypsin

2.Pepsin

3.Rennin

4.Lipase

Which one of the following have the highest number of species in nature?

1.Angiosperms

2.Fungi

3.Insects

4.Birds

Fruit and leaf drop at early stages can be prevented by the application of

Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of ?

The genotypes of a Husband and Wife are  and 
Among the blood types of their children, how many
different genotypes and phenotypes are possible?

A disease caused by an autosomal primary
non-disjunction is?

Enzymes and name of any enzyme of our digestive system and its function.

Related to biology.

I'm Student of class10

Explain with a suitable diagram

What is the meaning of microvascular niche? What does niche refer to in biology?

What is ascent of sap?

Name the largest blood vessel in the human body