Biology - 1
| Description: Objective Type (with answer) XI/XII/ISC/CBSE Practice | |
| Number of Questions: 100 | |
| Created by: | |
| Tags: XII BIOLOGY Plant Tissues Meristematic Tissue Crop Improvement Hybridisation in Plants to Improve Their Yield Cell Cycle Cell Cycle and Division Cell: Structure and Function Gene Expression and Regulation Regulation of Gene Expression |
The cells of parenchyma are characterized by:
The jute fibres are
Rubber is obtained by
The diploidy in higher animals is maintained by
Amitosis usually occurs in:
The functional unit of gene which synthesizes one polypeptide for protein synthesis is termed as
Yeast is mostly found on:
In which category is penicillium included?
'The hereditary characters are transmitted as unit factors' was first observed by:
Which of the following algae is a source of iodine?
A blue- green algae that has the tendency to fix nitrogen of the atmosphere is:
Which of the following hormone is responsible for causing seed dormancy?
Kinetin is formed due to the degradation of:
“Flame of the forest” is common name for:
The type of inflorescence present in banana is:
Which one of the following is a red algae?
Which of the following is a gram positive bacteria?
The sterile portion of Pinus microsporophyll is called:
Phylogenetic system of plant classification was proposed by:
In Palaeozoic era, the plants were predominantly:
When stamens and carpels of a bisexual flower mature at different times, it is known as
The basic unit of classification is:
Custard apple is an example of:
Internodal axis that develop between androecium and gynoecium is:
Which one of the following is a photosynthetic bacteria?
When a heterozygous offspring is crossed with a homozygous recessive parent, the cross is called a:
In the ascent of sap, water moves up in:
A true nucleus is absent in:
The drugs penicillin was first purified by:
The fact that there is at least one dark reaction in photosynthesis was discovered by:
The role of auxin and cytokinin in the root and shoot formation was first given by:
Which one of the following is not a modification of stem?
The vegetative plant body of Rhizopus is called:
The cell wall in certain species of chlamydomonas is surrounded by:
Potassium is taken by plants from the soil in the form of:
Escherichia coli is found in:
DNA in the mitochondria was first observed and proved by:
Genome is a:
Tunica corpus concept of shoot apex was first given by:
Formation of red tomatoes from green tomatoes takes place by:
A spongy tissue velamen is present in the:
If soaked pea seeds are kept in four separate flasks, they would germinate best in the flask containing:
Characteristic smell of onion bulb is due to the presence of:
An ovule is attached to the placenta by a stalk known as:
The process of double fertilisation means
Apocarpous gynocieum is found in the family:
The filaments of Spirogyra are seen in:
A drug from the roots of which of the following plants cure mental disorders?
If the process of respiration increases than that of photosynthesis, the plants will:
Leaf fall will occur when the contents of:
A cell placed in a strong salt solution will shrink because:
In litchi fruit, the edible part is :
Which of the following is a rootless aquatic plant in which a portion of the leaf forms a tiny sac for trapping insects?
The fruits of pear mainly consists of:
Both bacterial and yeast cells are similar in features, except that:
From which of the following species of Penicillium was the drug penicillin obtained by Flemming?
Malarial parasites can best be obtained from a patient:
Genera Plantarum was written by:
Suppose you want trophozoite stages in the life cycle of Plasmodium. Where will you look for it?
The use of insecticides now-a-days is not preferred because:
Which of the following mineral accelerate the rate of metamorphism in frog?
The grey crescent region marks the position of:
The act of spawning by the female frog is possible when it is stimulated by:
A free martin is a/an:
Which of the following forms of placenta is found in humans?
Which of the following protective layers is found only in mammals?
Autonomic nervous system does not regulate the functioning of:
The lobes of cerebellum are interconnected ventrally with the help of transverse fibres called:
The fifth (V) cranial nerve is:
The portion of the internal ear involved in hearing is:
Sometimes at the time of child birth relaxin hormone is given to facilitate the child birth. It helps in relaxing:
Man is not able to digest cellulose whereas herbivorous animals can. The reason for this is that
Plasmodium vivax is a:
Ammonia is the chief nitrogenous waste material eliminated by:
Which of the following diseases is caused by Leishmania in man?
Green Hydra remains green due to the presence of:
The first heard heart sound is:
If antennae of prawns are cut then they will:
In what respect can cockroaches be considered superior to mammals?
During the process of metamorphosis of frog, if eyes are removed and transplanted into the tail region, then
The maximum affinity of hemoglobin is for:
Miracidium larva is found in the life-cycle of:
In the abdominal cavity, the ovaries are held in position by tissues known as:
'Haemostasis' term is used for:
Which of the following statements is correct?
Which of the following enzymes is not present in the body of frog?
Kupffer cells are associated with:
The flow of gastric juice in influenced by the hormone:
Which of the following metabolic wastes is most toxic to the body tissues?
The chewing gum is obtain from:
All endocrine glands pour their secretions into:
In the cells of striated muscles, the mitochondria were first observed by:
The swelling that results due to the accumulation of excessive tissue fluids is known as:
The crystals of urate oxidase are seen in:
Which of the following cells have the smallest membrane surface in relation to its volume?
A person suffering from malaria usually has an enlarged spleen due to:
Male mosquito does not feed on the blood of man. The reason for this is that:
The scientific name of the common bath sponge is:
When a living sponge is squeezed through a fine mesh and the cells are allowed to fall in a water container,
Out of various gases present in the atmosphere, plant life mostly depends on