Biological Importance of Nucleic Acids

Q.

Define cell inclusion?

Q.

Which of the following is not a property of the genetic code?

1. Ambiguous

2. Non-­overlapping

3. Universal

4. Degeneracy

Q.

How many pairs of chromosomes are present in human beings?

Q. Rank the following substituent groups in order of decreasing priority according to the Cahn-Ingold-Prelog system: -CH(CH3)2 -CH2Br -CH2CH2Br (a) 2> 3> 1 (b)1>3>2 (c)3>1>2 (d) 2>1>3

Q.

An example for a saturated fatty acid, present in nature is

1. Oleic acid
2. linoleic acid
3. Linolenic acid
4. Palmitic acid

Q. Which of the following is not a cell inclusion?

1. Protein
2. Carbohydrate
3. Pigment
4. Vacuole

Q.

What Percentage of Human Genome Code For Proteins?

Q. The correct structure representation of carboxylate ion is:

1. 
2. 
3. 
4. None of the above

Q. Explain the functions of DNA and RNA.

Q. When picric acid is treated with aqueous sodium bicarbonate( NaHC^{14}O_3), a gas is liberated with effervessence . The gas evolved would be : a)H_2 b)CO_2 c)C^{14}O_2 d)NO_{

Q.

DNA (Deoxyribonucleic acid) and RNA (ribonucleic acid) are found in cells of all living beings. It amounts in the cells are:

1. RNA is more than DNA

2. DNA is more than RNA

3. RNA and DNA are equal in amount

4. None of the above

Q. The total number of base pairs present in total DNA of human cell is

1. 29 billions
2. 0.29 billions
3. 2.9 billions
4. 290 billions

Q. The correct increasing order of the acid strength of benzoic acid (I), $4-$nitrobenzoic acid (II), $3,4-$ dinitro benzoic acid (III) and $4$- methoxy benzoic acid (IV) is:

1. $I<II<III<IV$
2. $II<I<IV<III$
3. $IV<I<II<III$
4. $I<IV<II<III$
5. $IV<II<I<III$

Q. (A)
The compound A is a complimentary base of ___in DNA strands.

(JEE MAIN 2021)

1. Cytosine
2. Uracil
3. Guanine
4. Adenine

Q. Among the following organic acids, the acid present in rancid butter is:

1. pyruvic acid
2. lactic acid
3. butyric acid
4. acetic acid

Q. DNA produce ________ which is the source of information for protein biosynthesis.

1. t-RNA
2. m-RNA
3. r-RNA
4. none of these

Q.

The base is attached to which position of sugar to form nucleoside?

1. 3'

2. 2'

3. 1'

4. 4'

Q. No. of chromosomes present in human cell is:

1. 46
2. 4.6
3. 23
4. 2.3

Q. Major function of DNA is:

1. to control metabolism
2. to catalyze biochemical reactions
3. to transfer genetic information from one generation to the next
4. to control the synthesis of proteins

Q. What are the types of RNA molecule which perform different functions?

Q. The process by which synthesis of protein takes place based on the genetic information present in m-RNA is called :

1. translation
2. transcription
3. replication
4. messenger hypothesis

Q. identify organic acid present in rancid butter, tamarind, fats, bile juice, urine.?

Q. Which of the following RNA molecules carry genetic information from DNA to protein molecules?

1. Ribosomal RNA
2. Messenger RNA
3. Transfer RNA
4. Soluble RNA

Q. Which of the following varies from species to species?

1. A = T
2. C = G
3. A + G = C + T
4. AT$/$GC ratio

Q. Identify the main functional derivative of carboxylic acid.

1. Ester
2. Alkane
3. Alcohol
4. None of these

Q. Which is stronger acid in the following pair?
$2,4$-Dinitrophenol and $3,5$-Dinitrophenol.

Q. Explain the examples of functional derivative of carboxylic acid.

Q. The number of subunits present in haemoglobin are:

1. $2$
2. $3$
3. $4$
4. $5$

Q. The important features of genetic code are:
a. It is universal
b. It is commaless
c. It is degenerate
d. The third base in the codon is not always specific
The correct feature(s) is(are):

1. a only
2. b , c only
3. b , c , d only
4. all of the above

Q. Which of the following intermediate is most likely to be formed during addition of HBr on crotonic acid?
$C{H}_{3}CH=CHCOOH+HBr\left(g\right)\to C{H}_3\underset{\underset{Br}{|}}{C}H-C{H}_{2}COOH$

1. $C{H}_{3}C{H}_2\stackrel{⨁}{C}HCOOH$
2. $C{H}_3\stackrel{⨁}{C}HC{H}_{2}COOH$
3. $C{H}_{3}CH=CH\underset{⨁}{\stackrel{\stackrel{OH}{|}}{C}}OH$
4. none of these