Monthly Mock Test (June 30) - NEET MCQ

Lactose is a disaccharide that consists of b-D-galactose and b-D-glucose molecules bonded through a b1-4 glycosidic linkage. Lactose makes up around 2-8% of the solids in milk. The name comes from the Latin word for milk, plus the -ose ending used to name sugars.

Electronic configuration of element with atomic number 118 will be [Rn]5f¹⁴6d¹⁰ 7s²7p⁶. Since its elctronic configuration in the outer most orbit (ns²np⁶) resemble with that of inert or noble gases, therefore it will be noble gas element.

Cellulose is the structural polysaccharide of plant cell walls. They are long chain polymers of b-glucose units. The adjacent b-glucose units are joined by  linkages. 

As we know that

Atomic volume is the volume occupied by one gram of an element. Within a period from left to right, atomic volume first decreases and then increases due to increases of nuclear charge and increase in the number of electrons in the valence shell.

Greater is the positive charge on atom, large is effective nuclear charge. Hence smaller is the size

N, O and F (p-block elements) are highly electronegative non metals and will have the strongest tendency to form anions by gaining electrons from metal atoms.

The spindle fibres involved in cell division is made of microtubules

Reducing sugar is any sugar that has an aldehyde group or is capable  of forming one in solution through isomerisation. Reducing monosaccharides include glucose, fructose, glyceraldehyde  and galactose. Many disaccharides,  like lactose and maltose also have a reducing form, as one of the two units may have an open- chain form with an aldehyde group.
However, sucrose and trehalose in which the anomeric carbons of the two units are linked together, are non reducing disaccharides since neither of the rings is capable of opening.

Metaphase in characterized by the appearance of spindle fibres. Anaphase involves movement of chromatids towards the poles. Cytokinesis marks the division of the cytoplasm of the parent cell into daughter cells.

The nuclear membrane is present at prophase, when the cell moves from prophase it disappers and again it reappears in telophase.

Essential amino acids are those which cannot be synthesized in the body from precursors. These amino acids must be present in our diet. They are Valine, Leucine, Isoleucine, Lysine, Methionine, Phenylalanine, Tryptophan and Threonine.

The electronic configuration of element with atomic number 33 is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p³
As, its last shell have five electrons
and hence, its group is 10 + 5 = 15th or V A.
Hence,it lies in the 15th group.
 

Proton (H⁺) being very small in size would have very large hydration energy.

Kinetic energy is E

Velocity at highest point

[∴ at the highest point there is only horizontal velocity]

K.E. at highest point

Electron microscope uses a beam of electron which has wavelength much higher than that of photons.
The magnification power of electron microscope is also more than that of light microscope.
Hence, a major breakthrough in the studies of cell came with the development of electron microscope because the resolution power of microscope is much higher than that of light microscope.

Amongst isoelectronic ions, the size of the cation decreases as the magnitude of the charge increases.

Protein synthesis in an animal cell occurs on ribosomes present in cytoplasm as well as in mitcohondria because mitochondria and chloroplast also have their own DNA, RNA and ribosome so can synthesize half of their required proteins.

Radius of circular path = 20 cm = 

Angular speed of body = 10 rad/s

Linear velocity = radius × Angular speed

Both chloroplasts and mitochoridria have an internal compartment, the thylakoid space bounded by double membrane 

During anaphase APC (anaphase promoting complex) develops. It degenerates proteins binding the two chromatids in the region of centromere.
As a result the centromere of each chromosome divides. This converts the two chromatids into daughter chromosomes.

 V =36km/h=10m/s

Centripetal force

= 1000 N
 

Abnormally high difference between 2nd and 3rd ionization energy means that the element has two valence electrons, i.e., configuration (d)

The biological membranes are made up of lipids and proteins. The various lipids present in the membrane are phospholipids, cerebrosides, gangliosides, cholesterol, glycolipids etc. Proline is an amino acid which is generally known as chain breaker because of its structure. Proline is generally absent in membrane proteins. Proline usually occurs in regions where protein chain makes sharp turns. 
So, the correct answer is 'Proline'

Gene mutation or point mutation is the change in expression of a gene caused by change in number sequence and  types of nucleotides. A mutation from a wild gene type to a new type is called forward mutation. Reversal of mutated gene to wild type is reverse mutation. Chromosomal mutations are changes in the morphology of chromosomes.

Atomic number of the given element is 15 and it belongs to 5th group. Therefore atomic number of the element below the above element = 15 + 18 = 33.

Non-metal like halogens are strongest oxidizing agents according to electrochemical series they form acidic oxides like SO₂ they form anion by electron gain and they are highly electronegative.
(fluorine is most electronegative element of whole periodic table)

Let after 1 sec angle become 60°. When the end A moves by 10 m left, the end B moves upward by BB' =    = 17.3 m/s