Which of the following statements are correct ?
I. Peptidyl transferase helps in the process of peptide bond formation
II. The regulator, promoter and operator together called the control genes
III. Polypeptide chain elongation continues untill a termination codon reaches the ribosomes
IV. Gene regulation in eukaryotes can be explained by lac operon model

Which of the following statements are correct ? I. The structural gene is the segment of DNA, which exercises a central over transcription II. The regulator gene is responsible for the synthesis of repressor. IIIgt The operator gene is the segment of DNA, which carries code for the synthesis of protein IV.The promoter gene is the DNA segment at which RNA polymerase binds

Which of the following statements are correct? I. Introns are present in mRNA and exons are present in tRNA II. Codons are present in mRNA and anticodons in tRNA III. Every intron is a set of three terminator codons IV. Exons are present in eukaryotes, while introns are present in prokaryotes

Which of the following statements are correct regarding crossing over? I. It provides its results as variations, which are new material of evolutionary changes in nature. II. It helps in the construction of linkage maps. III. It affords a proof for linear arrangement of genes. IV. It helps in the cytoplasmic inheritance.

Which of the following statement are CORRECT? I. Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins. II. No significant digestive activity occurs in the large intestine. III. The egestion of faeces to the outside through the anal opening ( defecation ) is a voluntary process and is carried out by a mass peristaltic movement. IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting center in the medulla. (a) I, II and IV (b) II, III and IV (c) III and IV (d) II and III

Which of the following statements is correct about neo-lamarchism ? I. Some of the variations acquired by individuals can be transmitted to its offspring. II. Characters of organism are the result of interaction of genes and the environmental conditions. III. Theory emphasises on internal vital force. IV. Theory gives importance to the use and disuse of organs.

Which of the following statement are CORRECT? I. Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins. II. No significant digestive activity occurs in the large intestine. III. The egestion of faeces to the outside through the anal opening ( defecation ) is a voluntary process and is carried out by a mass peristaltic movement. IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting center in the medulla.