जीव विज्ञान ( Biology) SSC mts, group d,all competition exam

Which of the following groups of components is found in all viruses? (a) Envelope, nucleic acid, capsid (b) DNA, RNA and proteins (c) Proteins and a nucleic acid (d) Proteins, nucleic acids, carbohydrates, and lipids

A class contains three girls and four boys. Every Saturday, five go on a picnic (a different group of students is sent every week). During the picnic, each girl in the group is given a doll by the accompanying teacher. If all possible groups of five have gone for picnic once, the total number of dolls that the girls have got is a. 21 b. 45 c. 27 d. 24

In which of the following groups of organisms, nitrogenous wastes are excreted in such a way to minimise the excessive loss of water? (a) Birds and snails (b) Reptiles an insects (c) Insects and birds (d) All of the above

Which of the following groups have highly efficient circulatory and respiratory systems, and a complex nervous system and sensory organs ? (a) Reptiles (b) Mammals (c) Birds (d) All of these

Assertion: all monosaccharides are reducing sugar Reason : monosaccharides contain free aldehyde or free ketonic group (a) If both assertion & Reason are true & the Reason is a correct explanation of the Assertion (b) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion (c) If Assertion is True but the Reason is False (d) If both Assertion & Reason are false

Mark the statement as true or false (a) In unicellular organisms all the functions are performed by single cell. (b) In the complex body of multicellular animals different functions are carreid out by different group of cells. (c) In multicellular animals, a group of similar cells alongwith intercellular substances perform a specific function. such an organisation is called tissue. (d) The functions of cells vary according to their structure.

Consider the following four statements (a-d) and select the option which includes all the correct ones only? (a) Genus is a group of related species which has more characters in common in comparison to species of other genera. (b) Classification is not a single step process. (c) Solanum, Petunia and Datura are placed in family convolvulaceae (d) Taxonomic categories are both distinct biological entities and morphological aggregates.

Fill in the blanks: 1. India has a greater …..a…… diversity than a Scandinavian country like Norway. 2. The western Ghats have a greater …..b….. Diversity than the eastern Ghats. 3. It has taken millipons of years of evolution to accumulate the rich diversity in nature,but we would lose all the wealth in less than .....c..... if the present rates of species lossess continue. 4. For many taxonomic groups, species inventories are more complete in .....d..... than in ....e..... countries.

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, s, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The elements with atomic numbers 35,53 and 85 are all

Which is not true statement ? (a) alpha carbon of alpha amino acid is asymmetric (b)All proteins are found in L-form (c)Human body can synthesis all proteins they need (d)At pH=7 both amino and carboxylic groups exist in ionised form