Ques: Q: What is the term for coiled structures made of dna and proteins? Read this paragraph and choose the correct option from the provided answers: Chromosomes are coiled structures made of DNA and proteins. Chromosomes are the form of the genetic material of a cell during cell division. During other phases of the cell cycle, DNA is not coiled into chromosomes. Instead, it exists as a grainy material called chromatin . Choices: - neutrons - nodes - platelets - chromosomes A:
Ans: chromosomes

Ques: Q: What type of chemicals do ants communicate with? Read this paragraph and choose the correct option from the provided answers: We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy. Choices: - Alkanes - pesticides - hormones - pheromones A:
Ans: pheromones

Ques: Q: Hiv has proteins called what, internal to the envelope, which help stabilize virion shape? Read this paragraph and choose the correct option from the provided answers: Figure 21.4 Viruses can be either complex in shape or relatively simple. This figure shows three relatively complex virions: the bacteriophage T4, with its DNA-containing head group and tail fibers that attach to host cells; adenovirus, which uses spikes from its capsid to bind to host cells; and HIV, which uses glycoproteins embedded in its envelope to bind to host cells. Notice that HIV has proteins called matrix proteins, internal to the envelope, which help stabilize virion shape. (credit "bacteriophage, adenovirus": modification of work by NCBI, NIH; credit "HIV retrovirus": modification of work by NIAID, NIH). Choices: - reduction proteins - step proteins - sphere proteins - matrix proteins A:
Ans: matrix proteins

Ques: Q: What type of compounds can form crystals? Read this paragraph and choose the correct option from the provided answers: Many compounds form molecules, but ionic compounds form crystals instead. A crystal consists of many alternating positive and negative ions bonded together in a matrix. Look at the crystal of sodium chloride (NaCl) in the Figure below . The sodium and chloride ions are attracted to each other because they are oppositely charged, so they form ionic bonds. Choices: - integral compounds - magnetic compounds - molecular compounds - ionic compounds A:
Ans:
ionic compounds