Which of the following are the characteristics of prokaryotic operator O1

a. Made up of 21-bp sequence 

b. It has twofold/dyad symmetry 

c. Recognized by two subunits of Lac repressor

d. On each O1 four unit of Lac repressor binds

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#Question id: 34146

#Unit 7. System Physiology – Animal

I. Human pituitary prolactin has considerable structural similarity to human growth hormone and human chorionic somatomammotropin (hCS).

II. Structurally similar prolactin are secreted by the endometrium and by the placenta.

III. prolactin secretion is increased during pregnancy, reaching a peak at the time of parturition.

IV. The human prolactin receptor resembles the oxytocin receptor.

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#Question id: 26812

#Unit 8. Inheritance Biology

In an individual heterozygous, the abnormal chromosome loops out during chromosome pairing in prophase I, in which condition?

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#Question id: 10501

#Unit 6. System Physiology – Plant

Which defenses require specific detection systems and signal transduction pathways that can sense the presence of an herbivore or pathogen and alter gene expression and metabolism accordingly

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#Question id: 543

#Unit 1. Molecules and their Interaction Relevant to Biology

If glucose labeled with 14C at C^-1 (the aldehyde carbon) were metabolized in the liver, the first radioactive pyruvate formed would be labeled in:

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#Question id: 4880

#Unit 8. Inheritance Biology

There is following normal gene and their restriction site are given

 Mutant phenotype due to mutation that alters EcoRI site 1 occurs in this piece of DNA. There is following analysis of different band in their family (+ present , - absent) 

Visible band	Male Parents I	Female Parents II	Son  ( affected )	Daughter  ( normal)
2 Kb	+	+	-	+
4 Kb	+	+	-	+
5 Kb	+	+	+	+
6 Kb	-	+	+	+

 Which of the following is mode of inheritance of trait?